31122110113231 has 2 divisors, whose sum is σ = 31122110113232. Its totient is φ = 31122110113230.

The previous prime is 31122110113187. The next prime is 31122110113271. The reversal of 31122110113231 is 13231101122113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31122110113231 - 2²⁵ = 31122076558799 is a prime.

It is a super-2 number, since 2×31122110113231² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31122110113271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15561055056615 + 15561055056616.

It is an arithmetic number, because the mean of its divisors is an integer number (15561055056616).

Almost surely, 2^{31122110113231} is an apocalyptic number.

31122110113231 is a deficient number, since it is larger than the sum of its proper divisors (1).

31122110113231 is an equidigital number, since it uses as much as digits as its factorization.

31122110113231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 31122110113231 its reverse (13231101122113), we get a palindrome (44353211235344).

The spelling of 31122110113231 in words is "thirty-one trillion, one hundred twenty-two billion, one hundred ten million, one hundred thirteen thousand, two hundred thirty-one".