22118675921 has 2 divisors, whose sum is σ = 22118675922. Its totient is φ = 22118675920.

The previous prime is 22118675819. The next prime is 22118675983. The reversal of 22118675921 is 12957681122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21298483600 + 820192321 = 145940^2 + 28639^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22118675921 is a prime.

It is not a weakly prime, because it can be changed into another prime (22318675921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11059337960 + 11059337961.

It is an arithmetic number, because the mean of its divisors is an integer number (11059337961).

Almost surely, 2^22118675921 is an apocalyptic number.

It is an amenable number.

22118675921 is a deficient number, since it is larger than the sum of its proper divisors (1).

22118675921 is an equidigital number, since it uses as much as digits as its factorization.

22118675921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 44.

The spelling of 22118675921 in words is "twenty-two billion, one hundred eighteen million, six hundred seventy-five thousand, nine hundred twenty-one".