231331112111317 has 2 divisors, whose sum is σ = 231331112111318. Its totient is φ = 231331112111316.

The previous prime is 231331112111257. The next prime is 231331112111369. The reversal of 231331112111317 is 713111211133132.

231331112111317 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117581080197361 + 113750031913956 = 10843481^2 + 10665366^2 .

It is a cyclic number.

It is not a de Polignac number, because 231331112111317 - 2⁷ = 231331112111189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231331112111417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115665556055658 + 115665556055659.

It is an arithmetic number, because the mean of its divisors is an integer number (115665556055659).

Almost surely, 2^{231331112111317} is an apocalyptic number.

It is an amenable number.

231331112111317 is a deficient number, since it is larger than the sum of its proper divisors (1).

231331112111317 is an equidigital number, since it uses as much as digits as its factorization.

231331112111317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 31.

Adding to 231331112111317 its reverse (713111211133132), we get a palindrome (944442323244449).

The spelling of 231331112111317 in words is "two hundred thirty-one trillion, three hundred thirty-one billion, one hundred twelve million, one hundred eleven thousand, three hundred seventeen".