22021219972 has 12 divisors (see below), whose sum is σ = 38538720220. Its totient is φ = 11010157056.

The previous prime is 22021219951. The next prime is 22021219973. The reversal of 22021219972 is 27991212022.

It can be written as a sum of positive squares in 2 ways, for example, as 954439236 + 21066780736 = 30894^2 + 145144^2 .

It is not an unprimeable number, because it can be changed into a prime (22021219973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11404 + ... + 210172.

Almost surely, 2^22021219972 is an apocalyptic number.

It is an amenable number.

22021219972 is a deficient number, since it is larger than the sum of its proper divisors (16517500248).

22021219972 is a wasteful number, since it uses less digits than its factorization.

22021219972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226470 (or 226468 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 22021219972 in words is "twenty-two billion, twenty-one million, two hundred nineteen thousand, nine hundred seventy-two".