31222042112 has 160 divisors (see below), whose sum is σ = 65830786560. Its totient is φ = 14778408960.

The previous prime is 31222042079. The next prime is 31222042133. The reversal of 31222042112 is 21124022213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186958253 + ... + 186958419.

It is an arithmetic number, because the mean of its divisors is an integer number (411442416).

Almost surely, 2^31222042112 is an apocalyptic number.

31222042112 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31222042112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32915393280).

31222042112 is an abundant number, since it is smaller than the sum of its proper divisors (34608744448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31222042112 is a wasteful number, since it uses less digits than its factorization.

31222042112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432 (or 416 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 31222042112 its reverse (21124022213), we get a palindrome (52346064325).

The spelling of 31222042112 in words is "thirty-one billion, two hundred twenty-two million, forty-two thousand, one hundred twelve".