31103313112331 has 2 divisors, whose sum is σ = 31103313112332. Its totient is φ = 31103313112330.

The previous prime is 31103313112321. The next prime is 31103313112363. The reversal of 31103313112331 is 13321131330113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31103313112331 - 2³⁰ = 31102239370507 is a prime.

It is a super-2 number, since 2×31103313112331² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31103313112331.

It is not a weakly prime, because it can be changed into another prime (31103313112321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15551656556165 + 15551656556166.

It is an arithmetic number, because the mean of its divisors is an integer number (15551656556166).

Almost surely, 2^{31103313112331} is an apocalyptic number.

31103313112331 is a deficient number, since it is larger than the sum of its proper divisors (1).

31103313112331 is an equidigital number, since it uses as much as digits as its factorization.

31103313112331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 26.

Adding to 31103313112331 its reverse (13321131330113), we get a palindrome (44424444442444).

The spelling of 31103313112331 in words is "thirty-one trillion, one hundred three billion, three hundred thirteen million, one hundred twelve thousand, three hundred thirty-one".