1312331202131 has 2 divisors, whose sum is σ = 1312331202132. Its totient is φ = 1312331202130.

The previous prime is 1312331202113. The next prime is 1312331202313. The reversal of 1312331202131 is 1312021332131.

Together with previous prime (1312331202113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1312331202131 - 2²⁶ = 1312264093267 is a prime.

It is a super-2 number, since 2×1312331202131² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1312331202097 and 1312331202106.

It is not a weakly prime, because it can be changed into another prime (1312331202101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656165601065 + 656165601066.

It is an arithmetic number, because the mean of its divisors is an integer number (656165601066).

Almost surely, 2^{1312331202131} is an apocalyptic number.

1312331202131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312331202131 is an equidigital number, since it uses as much as digits as its factorization.

1312331202131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1312331202131 its reverse (1312021332131), we get a palindrome (2624352534262).

The spelling of 1312331202131 in words is "one trillion, three hundred twelve billion, three hundred thirty-one million, two hundred two thousand, one hundred thirty-one".