7811312234312 has 16 divisors (see below), whose sum is σ = 14922554033340. Its totient is φ = 3831964492096.

The previous prime is 7811312234273. The next prime is 7811312234329. The reversal of 7811312234312 is 2134322131187.

It can be written as a sum of positive squares in 2 ways, for example, as 7762208333476 + 49103900836 = 2786074^2 + 221594^2 .

It is a super-2 number, since 2×7811312234312² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9211452683 + ... + 9211453530.

Almost surely, 2^{7811312234312} is an apocalyptic number.

It is an amenable number.

7811312234312 is a deficient number, since it is larger than the sum of its proper divisors (7111241799028).

7811312234312 is a wasteful number, since it uses less digits than its factorization.

7811312234312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18422906272 (or 18422906268 counting only the distinct ones).

The product of its digits is 48384, while the sum is 38.

Adding to 7811312234312 its reverse (2134322131187), we get a palindrome (9945634365499).

The spelling of 7811312234312 in words is "seven trillion, eight hundred eleven billion, three hundred twelve million, two hundred thirty-four thousand, three hundred twelve".