Q: What number has 21 zeros behind it?

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One million trillion billion googolplex =10,000,000,000,000,000,000,000,000,00010100 but the progression is: thousand - 3 zeros million - 6 zeros billion 9 zeros trillion - 12 zeros quadrillion - 15 zeros quintillion - 18 zeros etc, googleplex - an inconceiveably large number equal to ten times the amount of a number that would be 10 with a hundred 0's behind it, or 100,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000, 000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000

any number containing 100 zeros has 100 zeros but i'm assuming you mean a 1 fallowed by 100 consecutive zeros; that is a Googol or 10,­000,­000,­000,­000,­000,­000,­000,­000,­000,­000,­000,­000,­000,­000,­000,­000,­000,­000,­000,­000,­000,­000,­000,­000,­000,­000,­000,­000,­000,­000,­000,­000,­000

This number is Nonillion and it has 30 zeros in it. That's a lot!

1+ 300 zeros

in my agenda at school, there is a little fact that the number centrillion, has 500 zeros. but, there is probaby a higher number out there. a googol is 1 followed by 100 zeros, but higher named number is a googolplex which is one followed by googol number of zeros - that's a lot of zeros!

Related questions

septillion

If the question is a number with a set of 8 zeros behind it, the answer is a hundred million. If the question is, as stated, 8 sets of zeros, the answer depends on how big each set is.

sextillion

one decillion

We're not sure which side of the number is its behind. We'd have to see it.

a sextillion :) i feel clever knowing that

A Novemdecillion has 60 zeroes

One hundred sextillion.

We're not sure which side is "behind" a number. A '1' with 100 zeros to the right ---> of it is called "1 googol".

2*1020 this is called 200quintillion a quintillion is a number with 18 zeros a sextillion is a number with 21 zeros your number has 20 zeros therefore it is not quite a sextillion yet.

number 1 followed by 21 zeros

in the million million billions