12313232011921 has 2 divisors, whose sum is σ = 12313232011922. Its totient is φ = 12313232011920.

The previous prime is 12313232011897. The next prime is 12313232011931. The reversal of 12313232011921 is 12911023231321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8569436569600 + 3743795442321 = 2927360^2 + 1934889^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12313232011921 is a prime.

It is a super-2 number, since 2×12313232011921² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12313232011931) 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, 6156616005960 + 6156616005961.

It is an arithmetic number, because the mean of its divisors is an integer number (6156616005961).

Almost surely, 2^{12313232011921} is an apocalyptic number.

It is an amenable number.

12313232011921 is a deficient number, since it is larger than the sum of its proper divisors (1).

12313232011921 is an equidigital number, since it uses as much as digits as its factorization.

12313232011921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 12313232011921 in words is "twelve trillion, three hundred thirteen billion, two hundred thirty-two million, eleven thousand, nine hundred twenty-one".