31130321310131 has 2 divisors, whose sum is σ = 31130321310132. Its totient is φ = 31130321310130.

The previous prime is 31130321310107. The next prime is 31130321310173. The reversal of 31130321310131 is 13101312303113.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31130321310131 is a prime.

It is a super-2 number, since 2×31130321310131² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31130321310097 and 31130321310106.

It is not a weakly prime, because it can be changed into another prime (31130321310331) 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, 15565160655065 + 15565160655066.

It is an arithmetic number, because the mean of its divisors is an integer number (15565160655066).

Almost surely, 2^{31130321310131} is an apocalyptic number.

31130321310131 is a deficient number, since it is larger than the sum of its proper divisors (1).

31130321310131 is an equidigital number, since it uses as much as digits as its factorization.

31130321310131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 23.

Adding to 31130321310131 its reverse (13101312303113), we get a palindrome (44231633613244).

The spelling of 31130321310131 in words is "thirty-one trillion, one hundred thirty billion, three hundred twenty-one million, three hundred ten thousand, one hundred thirty-one".