22121001012120 has 64 divisors (see below), whose sum is σ = 66433527289440. Its totient is φ = 5892664780800.

The previous prime is 22121001012053. The next prime is 22121001012151. The reversal of 22121001012120 is 2121010012122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 22121001012120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97836961 + ... + 98062800.

Almost surely, 2^{22121001012120} is an apocalyptic number.

22121001012120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121001012120 is an abundant number, since it is smaller than the sum of its proper divisors (44312526277320).

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

22121001012120 is a wasteful number, since it uses less digits than its factorization.

22121001012120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195900716 (or 195900712 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22121001012120 its reverse (2121010012122), we get a palindrome (24242011024242).

The spelling of 22121001012120 in words is "twenty-two trillion, one hundred twenty-one billion, one million, twelve thousand, one hundred twenty".