3131111231123 has 2 divisors, whose sum is σ = 3131111231124. Its totient is φ = 3131111231122.

The previous prime is 3131111231077. The next prime is 3131111231173. The reversal of 3131111231123 is 3211321111313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3131111231123 - 2²⁸ = 3130842795667 is a prime.

It is a super-2 number, since 2×3131111231123² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3131111231173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565555615561 + 1565555615562.

It is an arithmetic number, because the mean of its divisors is an integer number (1565555615562).

Almost surely, 2^{3131111231123} is an apocalyptic number.

3131111231123 is a deficient number, since it is larger than the sum of its proper divisors (1).

3131111231123 is an equidigital number, since it uses as much as digits as its factorization.

3131111231123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 23.

Adding to 3131111231123 its reverse (3211321111313), we get a palindrome (6342432342436).

The spelling of 3131111231123 in words is "three trillion, one hundred thirty-one billion, one hundred eleven million, two hundred thirty-one thousand, one hundred twenty-three".