23102221997 has 2 divisors, whose sum is σ = 23102221998. Its totient is φ = 23102221996.

The previous prime is 23102221973. The next prime is 23102222009. The reversal of 23102221997 is 79912220132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19486484836 + 3615737161 = 139594^2 + 60131^2 .

It is a cyclic number.

It is not a de Polignac number, because 23102221997 - 2¹⁶ = 23102156461 is a prime.

It is a super-2 number, since 2×23102221997² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23102221997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23102221957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11551110998 + 11551110999.

It is an arithmetic number, because the mean of its divisors is an integer number (11551110999).

Almost surely, 2^23102221997 is an apocalyptic number.

It is an amenable number.

23102221997 is a deficient number, since it is larger than the sum of its proper divisors (1).

23102221997 is an equidigital number, since it uses as much as digits as its factorization.

23102221997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 38.

The spelling of 23102221997 in words is "twenty-three billion, one hundred two million, two hundred twenty-one thousand, nine hundred ninety-seven".