22111999972 has 12 divisors (see below), whose sum is σ = 39000693760. Its totient is φ = 10968944616.

The previous prime is 22111999967. The next prime is 22111999979. The reversal of 22111999972 is 27999911122.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (22111999979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21763272 + ... + 21764287.

Almost surely, 2^22111999972 is an apocalyptic number.

It is an amenable number.

22111999972 is a deficient number, since it is larger than the sum of its proper divisors (16888693788).

22111999972 is a wasteful number, since it uses less digits than its factorization.

22111999972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43527690 (or 43527688 counting only the distinct ones).

The product of its digits is 367416, while the sum is 52.

The spelling of 22111999972 in words is "twenty-two billion, one hundred eleven million, nine hundred ninety-nine thousand, nine hundred seventy-two".