312123102131 has 2 divisors, whose sum is σ = 312123102132. Its totient is φ = 312123102130.

The previous prime is 312123102127. The next prime is 312123102163. The reversal of 312123102131 is 131201321213.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312123102131 - 2² = 312123102127 is a prime.

It is a super-2 number, since 2×312123102131² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (312123102101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156061551065 + 156061551066.

It is an arithmetic number, because the mean of its divisors is an integer number (156061551066).

Almost surely, 2^312123102131 is an apocalyptic number.

312123102131 is a deficient number, since it is larger than the sum of its proper divisors (1).

312123102131 is an equidigital number, since it uses as much as digits as its factorization.

312123102131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 312123102131 its reverse (131201321213), we get a palindrome (443324423344).

The spelling of 312123102131 in words is "three hundred twelve billion, one hundred twenty-three million, one hundred two thousand, one hundred thirty-one".