31313113112 has 16 divisors (see below), whose sum is σ = 58714110360. Its totient is φ = 15656017024.

The previous prime is 31313112979. The next prime is 31313113141. The reversal of 31313113112 is 21131131313.

It is a super-2 number, since 2×31313113112² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 291743 + ... + 384369.

Almost surely, 2^31313113112 is an apocalyptic number.

It is an amenable number.

31313113112 is a deficient number, since it is larger than the sum of its proper divisors (27400997248).

31313113112 is a wasteful number, since it uses less digits than its factorization.

31313113112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134890 (or 134886 counting only the distinct ones).

The product of its digits is 162, while the sum is 20.

Adding to 31313113112 its reverse (21131131313), we get a palindrome (52444244425).

The spelling of 31313113112 in words is "thirty-one billion, three hundred thirteen million, one hundred thirteen thousand, one hundred twelve".