21222020022012 has 24 divisors (see below), whose sum is σ = 55020051909200. Its totient is φ = 7074006673968.

The previous prime is 21222020021987. The next prime is 21222020022029. The reversal of 21222020022012 is 21022002022212.

21222020022012 is a `hidden beast` number, since 2 + 12 + 220 + 200 + 220 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 98250092587 + ... + 98250092802.

Almost surely, 2^{21222020022012} is an apocalyptic number.

It is an amenable number.

21222020022012 is an abundant number, since it is smaller than the sum of its proper divisors (33798031887188).

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

21222020022012 is a wasteful number, since it uses less digits than its factorization.

21222020022012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196500185402 (or 196500185394 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 21222020022012 its reverse (21022002022212), we get a palindrome (42244022044224).

It can be divided in two parts, 212220200 and 22012, that added together give a palindrome (212242212).

The spelling of 21222020022012 in words is "twenty-one trillion, two hundred twenty-two billion, twenty million, twenty-two thousand, twelve".