1312313131 has 2 divisors, whose sum is σ = 1312313132. Its totient is φ = 1312313130.

The previous prime is 1312313129. The next prime is 1312313137. The reversal of 1312313131 is 1313132131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1312313131 - 2¹ = 1312313129 is a prime.

It is a super-2 number, since 2×1312313131² = 3444331507590046322, which contains 22 as substring.

Together with 1312313129, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1312313099 and 1312313108.

It is not a weakly prime, because it can be changed into another prime (1312313137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656156565 + 656156566.

It is an arithmetic number, because the mean of its divisors is an integer number (656156566).

Almost surely, 2^1312313131 is an apocalyptic number.

1312313131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312313131 is an equidigital number, since it uses as much as digits as its factorization.

1312313131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162, while the sum is 19.

The square root of 1312313131 is about 36225.8627364484. The cubic root of 1312313131 is about 1094.8278208320.

Adding to 1312313131 its reverse (1313132131), we get a palindrome (2625445262).

The spelling of 1312313131 in words is "one billion, three hundred twelve million, three hundred thirteen thousand, one hundred thirty-one".