31311310120312 has 16 divisors (see below), whose sum is σ = 58952311070400. Its totient is φ = 15590693834880.

The previous prime is 31311310120297. The next prime is 31311310120351. The reversal of 31311310120312 is 21302101311313.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8120151112 + ... + 8120154967.

It is an arithmetic number, because the mean of its divisors is an integer number (3684519441900).

Almost surely, 2^{31311310120312} is an apocalyptic number.

It is an amenable number.

31311310120312 is a deficient number, since it is larger than the sum of its proper divisors (27641000950088).

31311310120312 is a wasteful number, since it uses less digits than its factorization.

31311310120312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16240306326 (or 16240306322 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 31311310120312 its reverse (21302101311313), we get a palindrome (52613411431625).

The spelling of 31311310120312 in words is "thirty-one trillion, three hundred eleven billion, three hundred ten million, one hundred twenty thousand, three hundred twelve".