22221172992 has 72 divisors (see below), whose sum is σ = 61048556800. Its totient is φ = 7168112640.

The previous prime is 22221172951. The next prime is 22221172993. The reversal of 22221172992 is 29927112222.

It is a self number, because there is not a number n which added to its sum of digits gives 22221172992.

It is not an unprimeable number, because it can be changed into a prime (22221172993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 442867 + ... + 490482.

Almost surely, 2^22221172992 is an apocalyptic number.

It is an amenable number.

22221172992 is an abundant number, since it is smaller than the sum of its proper divisors (38827383808).

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

22221172992 is an equidigital number, since it uses as much as digits as its factorization.

22221172992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933399 (or 933385 counting only the distinct ones).

The product of its digits is 36288, while the sum is 39.

The spelling of 22221172992 in words is "twenty-two billion, two hundred twenty-one million, one hundred seventy-two thousand, nine hundred ninety-two".