1312113331 has 4 divisors (see below), whose sum is σ = 1334352600. Its totient is φ = 1289874064.

The previous prime is 1312113317. The next prime is 1312113337. The reversal of 1312113331 is 1333112131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312113331 is a prime.

It is a super-2 number, since 2×1312113331² = 3443282786775831122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312113299 and 1312113308.

It is not an unprimeable number, because it can be changed into a prime (1312113337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11119546 + ... + 11119663.

It is an arithmetic number, because the mean of its divisors is an integer number (333588150).

Almost surely, 2^1312113331 is an apocalyptic number.

1312113331 is a deficient number, since it is larger than the sum of its proper divisors (22239269).

1312113331 is an equidigital number, since it uses as much as digits as its factorization.

1312113331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22239268.

The product of its digits is 162, while the sum is 19.

The square root of 1312113331 is about 36223.1049331777. The cubic root of 1312113331 is about 1094.7722554094.

Adding to 1312113331 its reverse (1333112131), we get a palindrome (2645225462).

The spelling of 1312113331 in words is "one billion, three hundred twelve million, one hundred thirteen thousand, three hundred thirty-one".