What is a 12-digit number?

A 12-digit number is a number that has 12 digits where the first digit must be 1 or greater. On this page, we will answer three questions for you: What is the smallest 12-digit number? What is the largest 12-digit number? How many 12-digit numbers are there?

Smallest 12-digit number
The smallest 12-digit number is 1 followed by 11 zeros. This number is called one hundred billion.

Largest 12-digit number
The largest 12-digit number is 9 followed by another 11 nines. This number is called nine hundred ninety-nine billion nine hundred ninety-nine million nine hundred ninety-nine thousand nine hundred ninety-nine.

Total number of 12-digit numbers
There are a total of nine hundred billion different 12-digit numbers. nine hundred billion is 9 followed by 11 zeros.

Digit Numbers
Here you can learn about another digit number.

What is a 13-digit number?
Go here for information about the next digit number on our list that we have information about.