23221120957 has 2 divisors, whose sum is σ = 23221120958. Its totient is φ = 23221120956.

The previous prime is 23221120943. The next prime is 23221120999. The reversal of 23221120957 is 75902112232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19305990916 + 3915130041 = 138946^2 + 62571^2 .

It is a cyclic number.

It is not a de Polignac number, because 23221120957 - 2⁷ = 23221120829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23221120057) 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, 11610560478 + 11610560479.

It is an arithmetic number, because the mean of its divisors is an integer number (11610560479).

Almost surely, 2^23221120957 is an apocalyptic number.

It is an amenable number.

23221120957 is a deficient number, since it is larger than the sum of its proper divisors (1).

23221120957 is an equidigital number, since it uses as much as digits as its factorization.

23221120957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 34.

The spelling of 23221120957 in words is "twenty-three billion, two hundred twenty-one million, one hundred twenty thousand, nine hundred fifty-seven".