22221999965 has 32 divisors (see below), whose sum is σ = 29596223232. Its totient is φ = 15882048000.

The previous prime is 22221999949. The next prime is 22222000039. The reversal of 22221999965 is 56999912222.

It is not a de Polignac number, because 22221999965 - 2⁴ = 22221999949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22221999965.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1213175 + ... + 1231355.

It is an arithmetic number, because the mean of its divisors is an integer number (924881976).

Almost surely, 2^22221999965 is an apocalyptic number.

It is an amenable number.

22221999965 is a deficient number, since it is larger than the sum of its proper divisors (7374223267).

22221999965 is a wasteful number, since it uses less digits than its factorization.

22221999965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18581.

The product of its digits is 3149280, while the sum is 56.

The spelling of 22221999965 in words is "twenty-two billion, two hundred twenty-one million, nine hundred ninety-nine thousand, nine hundred sixty-five".