100020212100 has 72 divisors (see below), whose sum is σ = 321546468320. Its totient is φ = 26672055840.

The previous prime is 100020212063. The next prime is 100020212111. The reversal of 100020212100 is 1212020001.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18519562 + ... + 18524961.

Almost surely, 2^100020212100 is an apocalyptic number.

100020212100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100020212100 is an abundant number, since it is smaller than the sum of its proper divisors (221526256220).

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

100020212100 is a wasteful number, since it uses less digits than its factorization.

100020212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37044546 (or 37044533 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 100020212100 its reverse (1212020001), we get a palindrome (101232232101).

The spelling of 100020212100 in words is "one hundred billion, twenty million, two hundred twelve thousand, one hundred".