21202112000100 has 36 divisors (see below), whose sum is σ = 61344777387824. Its totient is φ = 5653896533280.

The previous prime is 21202112000071. The next prime is 21202112000107. The reversal of 21202112000100 is 100021120212.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (21202112000107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35336853034 + ... + 35336853633.

Almost surely, 2^{21202112000100} is an apocalyptic number.

21202112000100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202112000100 is an abundant number, since it is smaller than the sum of its proper divisors (40142665387724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21202112000100 is a wasteful number, since it uses less digits than its factorization.

21202112000100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70673706684 (or 70673706677 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21202112000100 its reverse (100021120212), we get a palindrome (21302133120312).

The spelling of 21202112000100 in words is "twenty-one trillion, two hundred two billion, one hundred twelve million, one hundred", and thus it is an aban number.