23212131221969 has 2 divisors, whose sum is σ = 23212131221970. Its totient is φ = 23212131221968.

The previous prime is 23212131221957. The next prime is 23212131221987. The reversal of 23212131221969 is 96912213121232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17627360265025 + 5584770956944 = 4198495^2 + 2363212^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23212131221969 is a prime.

It is a super-2 number, since 2×23212131221969² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (23212131221989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11606065610984 + 11606065610985.

It is an arithmetic number, because the mean of its divisors is an integer number (11606065610985).

Almost surely, 2^{23212131221969} is an apocalyptic number.

It is an amenable number.

23212131221969 is a deficient number, since it is larger than the sum of its proper divisors (1).

23212131221969 is an equidigital number, since it uses as much as digits as its factorization.

23212131221969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 44.

The spelling of 23212131221969 in words is "twenty-three trillion, two hundred twelve billion, one hundred thirty-one million, two hundred twenty-one thousand, nine hundred sixty-nine".