21021422123112 has 64 divisors (see below), whose sum is σ = 55659576876480. Its totient is φ = 6593221327872.

The previous prime is 21021422123099. The next prime is 21021422123161. The reversal of 21021422123112 is 21132122412012.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 5222383 + ... + 8325630.

It is an arithmetic number, because the mean of its divisors is an integer number (869680888695).

Almost surely, 2^{21021422123112} is an apocalyptic number.

It is an amenable number.

21021422123112 is an abundant number, since it is smaller than the sum of its proper divisors (34638154753368).

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

21021422123112 is a wasteful number, since it uses less digits than its factorization.

21021422123112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13551842 (or 13551838 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 21021422123112 its reverse (21132122412012), we get a palindrome (42153544535124).

The spelling of 21021422123112 in words is "twenty-one trillion, twenty-one billion, four hundred twenty-two million, one hundred twenty-three thousand, one hundred twelve".