31113223123117 has 2 divisors, whose sum is σ = 31113223123118. Its totient is φ = 31113223123116.

The previous prime is 31113223123009. The next prime is 31113223123153. The reversal of 31113223123117 is 71132132231113.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22652402378116 + 8460820745001 = 4759454^2 + 2908749^2 .

It is a cyclic number.

It is not a de Polignac number, because 31113223123117 - 2²³ = 31113214734509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31113223124117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556611561558 + 15556611561559.

It is an arithmetic number, because the mean of its divisors is an integer number (15556611561559).

Almost surely, 2^{31113223123117} is an apocalyptic number.

It is an amenable number.

31113223123117 is a deficient number, since it is larger than the sum of its proper divisors (1).

31113223123117 is an equidigital number, since it uses as much as digits as its factorization.

31113223123117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 31.

The spelling of 31113223123117 in words is "thirty-one trillion, one hundred thirteen billion, two hundred twenty-three million, one hundred twenty-three thousand, one hundred seventeen".