Number of Zeros in Large Numbers

We often use numbers like ten, hundred and thousand, and we may also use million or billion, but there are many large numbers which we do not use them regularly. Do you know how many zeros in these big numbers?

When a number is very large, we often use scientific format to write them into power of tens. For example, 1 nonillion has 30 zeros and we write it as 1030.

If we need to list all the zeros, we often use the thousand separator to make them easy to read, for example: 1 billion = 1,000,000,000. Instead of writing as 1000000000, which is very hard to read, we use the thousand separator to have zeros into groups.

NumberZerosScientific Format
One0100
Ten1101
Hundred2102
Thousand3103
Million6106
Billion9109
Trillion121012
Quadrillion151015
Quintillion181018
Sextillion211021
Septillion241024
Octillion271027
Nonillion301030
Decillion331033
Undecillion361036
Duodecillion391039
Tredecillion421042
Quattuordecillion451045
Quindecillion481048
Sexdecillion511051
Septendecillion541054
Octodecillion571057
Novemdecillion601060
Vigintillion631063
Centillion30310303
Googol10010100

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