31312112311 has 2 divisors, whose sum is σ = 31312112312. Its totient is φ = 31312112310.

The previous prime is 31312112291. The next prime is 31312112323. The reversal of 31312112311 is 11321121313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31312112311 - 2⁹ = 31312111799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31312112411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656056155 + 15656056156.

It is an arithmetic number, because the mean of its divisors is an integer number (15656056156).

Almost surely, 2^31312112311 is an apocalyptic number.

31312112311 is a deficient number, since it is larger than the sum of its proper divisors (1).

31312112311 is an equidigital number, since it uses as much as digits as its factorization.

31312112311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108, while the sum is 19.

Adding to 31312112311 its reverse (11321121313), we get a palindrome (42633233624).

The spelling of 31312112311 in words is "thirty-one billion, three hundred twelve million, one hundred twelve thousand, three hundred eleven".