I did try to google this with not much success. Take the number
3,486,421
it would be written as ‘three million four hundred and eighty six thousand four hundred and twenty one’ right? Would the number
7,145,071
be written ‘seven million one hundred and forty five thousand seventy one’ (it’s the 0 in the hundred place that has me confused). Finally, how would you write out
365,865,012,159,983? and
365,865,312,159,983?
Thanks
seven million one hundred and forty-five thousand and seventy one
three hundred and sixty-five trillion eight hundred and sixty-five billion twelve million one hundred and fifty-nine thousand nine hundred and eighty-three
three hundred and sixty-five trillion eight hundred and sixty-five billion three hundred and twelve million one hundred and fifty-nine thousand nine hundred and eighty-three
Is the question about the rules regarding “and”? They aren’t particularly standardized. Go with whatever sounds natural to you.
Thank you.
The “and” depends entirely on style. Most American styles would omit the “and.” Also, “seventy-one” must be hyphenated.
Though Indistinguishable makes a good point, my posts are in British English where you should always use an ‘and’ if it is appropiate.
see above, the unhyphenated seventy-one is just a typo.
and should only be used with decimals.
I’ve never heard anyone try and use hundred, thousand, etc with octal or hex.
Someone once said: “There are ten types of people, those who understand binary and those who don’t”.
Actually, he said “There are 10 types of people.” (In binary, 10 is pronounced as “two” or “one-zero”.)
Someone else once said, “There are seventeen types of people–one that understands hex and F everyone else.” 
Wow. This is the only joke along these lines I’ve ever found actually humorous.
Actually, he didn’t - that only works when the joke is written down.
I gather that, to most people, ten means “1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1” and not “The number signified, in whatever base one is implicitly using, by ‘10’ (i.e., the base itself)”. Then again, most people rarely talk about numerical notation in alternative bases anyway.
Er, yes, that was the whole point of the joke.
Clue: The joke could only be understood by people who themselves understand binary. To anyone who didn’t understand binary it would, of course, be completely impenetrable.
For decimals, you would not use “and,” you’d use “point.” Thus, 7.05 gets read as “seven point zero five.”
The “and” would only be appropriate with fractions. Thus, 1-1/4 gets read as “one and one quarter.” I suppose you could read a decimal as a fraction, in which case you’d resort to “and.” Thus, 7.05 could alternately be read as “seven and five one-hundredths.”
3,486,421 gets read as “three million four hundred eighty six thousand four hundred twenty one.” In the absence of any fractions, placing “and” in there doesn’t add clarity.
Unlike your mom! Oh, sorry, I thought this was a jokes-only thread.
We recently had a thread about this, and I don’t think anyone else subscribes to this theory. I, personally, try not to use “and” until the decimal point (or fraction), so I would agree with your written-out version, since it is a whole number.
But anyway, I think the “and” issue is not what the OP was concerned about. I can kind of understand how you might not be sure what to do if a digit is zero. But if you think about it, we deal with it all the time:
333 = three hundred thirty-three
330 = three hundred thirty
300 = three hundred
303 = three hundred three
3,003 = three thousand three
3,030,300,003 = three billion thirty million three hundred thousand three
3,000,000,000,003 = three trillion three (at this point, you might want to think about significant digits)
I clearly remember from second-grade math that our teacher pleaded with us to never never add “and” when writing out or saying a number. She must have really gone on about it because that was 25 years ago.
Just like you wouldn’t say that “102” is “one hundred and two” you would not say that “10,102” is “ten thousand one hundred and two”.
MLA guidelines only require written numbers in certain cases. They recommend using numerals unless it can be expressed in two words or less.
rules summarized here
http://writing-style-guide.papercheck.com/~paperch1/index.php?title=Expressing_Numbers_MLA
I would say that “102” is “one hundred and two”. But who cares? Say whatever you want. We don’t have to be in lockstep.
Thanks for that information. In this case however I need to write the numbers out in words, it’s part of a challenge in a puzzle I’m constructing.