202100020120 has 32 divisors (see below), whose sum is σ = 454786534800. Its totient is φ = 80829076608.

The previous prime is 202100020117. The next prime is 202100020139. The reversal of 202100020120 is 21020001202.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 202100020097 and 202100020106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38790 + ... + 636949.

Almost surely, 2^202100020120 is an apocalyptic number.

202100020120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202100020120 is an abundant number, since it is smaller than the sum of its proper divisors (252686514680).

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

202100020120 is a wasteful number, since it uses less digits than its factorization.

202100020120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683227 (or 683223 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 202100020120 its reverse (21020001202), we get a palindrome (223120021322).

The spelling of 202100020120 in words is "two hundred two billion, one hundred million, twenty thousand, one hundred twenty".