22011111987 has 16 divisors (see below), whose sum is σ = 30847703040. Its totient is φ = 13933612352.

The previous prime is 22011111971. The next prime is 22011112007. The reversal of 22011111987 is 78911111022.

It is a cyclic number.

It is not a de Polignac number, because 22011111987 - 2⁴ = 22011111971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22011111907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1154787 + ... + 1173692.

It is an arithmetic number, because the mean of its divisors is an integer number (1927981440).

Almost surely, 2^22011111987 is an apocalyptic number.

22011111987 is a deficient number, since it is larger than the sum of its proper divisors (8836591053).

22011111987 is a wasteful number, since it uses less digits than its factorization.

22011111987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2328642.

The product of its (nonzero) digits is 2016, while the sum is 33.

The spelling of 22011111987 in words is "twenty-two billion, eleven million, one hundred eleven thousand, nine hundred eighty-seven".