31311222112 has 24 divisors (see below), whose sum is σ = 62129362176. Its totient is φ = 15532336512.

The previous prime is 31311222101. The next prime is 31311222127. The reversal of 31311222112 is 21122211313.

It is a self number, because there is not a number n which added to its sum of digits gives 31311222112.

It is a congruent number.

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, 3848203 + ... + 3856330.

It is an arithmetic number, because the mean of its divisors is an integer number (2588723424).

Almost surely, 2^31311222112 is an apocalyptic number.

31311222112 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31311222112 is a deficient number, since it is larger than the sum of its proper divisors (30818140064).

31311222112 is a wasteful number, since it uses less digits than its factorization.

31311222112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7704670 (or 7704662 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

Adding to 31311222112 its reverse (21122211313), we get a palindrome (52433433425).

The spelling of 31311222112 in words is "thirty-one billion, three hundred eleven million, two hundred twenty-two thousand, one hundred twelve".