31312232113042 has 4 divisors (see below), whose sum is σ = 46968348169566. Its totient is φ = 15656116056520.

The previous prime is 31312232113021. The next prime is 31312232113133. The reversal of 31312232113042 is 24031123221313.

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

It can be written as a sum of positive squares in only one way, i.e., 24344168508361 + 6968063604681 = 4933981^2 + 2639709^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31312232113042.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7828058028259 + ... + 7828058028262.

Almost surely, 2^{31312232113042} is an apocalyptic number.

31312232113042 is a deficient number, since it is larger than the sum of its proper divisors (15656116056524).

31312232113042 is a wasteful number, since it uses less digits than its factorization.

31312232113042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15656116056523.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 31312232113042 its reverse (24031123221313), we get a palindrome (55343355334355).

The spelling of 31312232113042 in words is "thirty-one trillion, three hundred twelve billion, two hundred thirty-two million, one hundred thirteen thousand, forty-two".