31312222113112 has 32 divisors (see below), whose sum is σ = 59051761685280. Its totient is φ = 15565091729920.

The previous prime is 31312222113083. The next prime is 31312222113113. The reversal of 31312222113112 is 21131122221313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312222113113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42707973 + ... + 43434955.

It is an arithmetic number, because the mean of its divisors is an integer number (1845367552665).

Almost surely, 2^{31312222113112} is an apocalyptic number.

It is an amenable number.

31312222113112 is a deficient number, since it is larger than the sum of its proper divisors (27739539572168).

31312222113112 is a wasteful number, since it uses less digits than its factorization.

31312222113112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758283 (or 758279 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

Adding to 31312222113112 its reverse (21131122221313), we get a palindrome (52443344334425).

The spelling of 31312222113112 in words is "thirty-one trillion, three hundred twelve billion, two hundred twenty-two million, one hundred thirteen thousand, one hundred twelve".