31303122113 has 2 divisors, whose sum is σ = 31303122114. Its totient is φ = 31303122112.

The previous prime is 31303122089. The next prime is 31303122127. The reversal of 31303122113 is 31122130313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17200847104 + 14102275009 = 131152^2 + 118753^2 .

It is a cyclic number.

It is not a de Polignac number, because 31303122113 - 2²² = 31298927809 is a prime.

It is not a weakly prime, because it can be changed into another prime (31303122133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15651561056 + 15651561057.

It is an arithmetic number, because the mean of its divisors is an integer number (15651561057).

Almost surely, 2^31303122113 is an apocalyptic number.

It is an amenable number.

31303122113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31303122113 is an equidigital number, since it uses as much as digits as its factorization.

31303122113 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 20.

Adding to 31303122113 its reverse (31122130313), we get a palindrome (62425252426).

The spelling of 31303122113 in words is "thirty-one billion, three hundred three million, one hundred twenty-two thousand, one hundred thirteen".