31313103112 has 16 divisors (see below), whose sum is σ = 59317348860. Its totient is φ = 15495143424.

The previous prime is 31313103077. The next prime is 31313103127. The reversal of 31313103112 is 21130131313.

It can be written as a sum of positive squares in 2 ways, for example, as 30312899236 + 1000203876 = 174106^2 + 31626^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31313103112.

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, 20175193 + ... + 20176744.

Almost surely, 2^31313103112 is an apocalyptic number.

It is an amenable number.

31313103112 is a deficient number, since it is larger than the sum of its proper divisors (28004245748).

31313103112 is a wasteful number, since it uses less digits than its factorization.

31313103112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40352040 (or 40352036 counting only the distinct ones).

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

Adding to 31313103112 its reverse (21130131313), we get a palindrome (52443234425).

The spelling of 31313103112 in words is "thirty-one billion, three hundred thirteen million, one hundred three thousand, one hundred twelve".