22111208125961 has 2 divisors, whose sum is σ = 22111208125962. Its totient is φ = 22111208125960.

The previous prime is 22111208125933. The next prime is 22111208125969. The reversal of 22111208125961 is 16952180211122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19772082589561 + 2339125536400 = 4446581^2 + 1529420^2 .

It is a cyclic number.

It is not a de Polignac number, because 22111208125961 - 2⁴² = 17713161614857 is a prime.

It is not a weakly prime, because it can be changed into another prime (22111208125969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11055604062980 + 11055604062981.

It is an arithmetic number, because the mean of its divisors is an integer number (11055604062981).

Almost surely, 2^{22111208125961} is an apocalyptic number.

It is an amenable number.

22111208125961 is a deficient number, since it is larger than the sum of its proper divisors (1).

22111208125961 is an equidigital number, since it uses as much as digits as its factorization.

22111208125961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 41.

The spelling of 22111208125961 in words is "twenty-two trillion, one hundred eleven billion, two hundred eight million, one hundred twenty-five thousand, nine hundred sixty-one".