31311012312311 has 2 divisors, whose sum is σ = 31311012312312. Its totient is φ = 31311012312310.

The previous prime is 31311012312287. The next prime is 31311012312337. The reversal of 31311012312311 is 11321321011313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31311012312311 - 2⁴² = 26912965801207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31311012312011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15655506156155 + 15655506156156.

It is an arithmetic number, because the mean of its divisors is an integer number (15655506156156).

Almost surely, 2^{31311012312311} is an apocalyptic number.

31311012312311 is a deficient number, since it is larger than the sum of its proper divisors (1).

31311012312311 is an equidigital number, since it uses as much as digits as its factorization.

31311012312311 is an evil number, because the sum of its binary digits is even.

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

Adding to 31311012312311 its reverse (11321321011313), we get a palindrome (42632333323624).

The spelling of 31311012312311 in words is "thirty-one trillion, three hundred eleven billion, twelve million, three hundred twelve thousand, three hundred eleven".