21012202012120 has 32 divisors (see below), whose sum is σ = 51575404939920. Its totient is φ = 7640800731520.

The previous prime is 21012202012111. The next prime is 21012202012133. The reversal of 21012202012120 is 2121020221012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21012202012094 and 21012202012103.

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, 23877501847 + ... + 23877502726.

Almost surely, 2^{21012202012120} is an apocalyptic number.

21012202012120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21012202012120 is an abundant number, since it is smaller than the sum of its proper divisors (30563202927800).

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

21012202012120 is a wasteful number, since it uses less digits than its factorization.

21012202012120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47755004595 (or 47755004591 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21012202012120 its reverse (2121020221012), we get a palindrome (23133222233132).

The spelling of 21012202012120 in words is "twenty-one trillion, twelve billion, two hundred two million, twelve thousand, one hundred twenty".