22121099965 has 16 divisors (see below), whose sum is σ = 28010707200. Its totient is φ = 16737246592.

The previous prime is 22121099953. The next prime is 22121099981. The reversal of 22121099965 is 56999012122.

It is a cyclic number.

It is not a de Polignac number, because 22121099965 - 2²⁹ = 21584229053 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1070425 + ... + 1090894.

It is an arithmetic number, because the mean of its divisors is an integer number (1750669200).

Almost surely, 2^22121099965 is an apocalyptic number.

It is an amenable number.

22121099965 is a deficient number, since it is larger than the sum of its proper divisors (5889607235).

22121099965 is a wasteful number, since it uses less digits than its factorization.

22121099965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2161436.

The product of its (nonzero) digits is 174960, while the sum is 46.

The spelling of 22121099965 in words is "twenty-two billion, one hundred twenty-one million, ninety-nine thousand, nine hundred sixty-five".