31220232010112 has 64 divisors (see below), whose sum is σ = 64912188987360. Its totient is φ = 14928784527360.

The previous prime is 31220232010061. The next prime is 31220232010139. The reversal of 31220232010112 is 21101023202213.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15828812 + ... + 17691572.

Almost surely, 2^{31220232010112} is an apocalyptic number.

31220232010112 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 31220232010112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32456094493680).

31220232010112 is an abundant number, since it is smaller than the sum of its proper divisors (33691956977248).

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

31220232010112 is a wasteful number, since it uses less digits than its factorization.

31220232010112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1868491 (or 1868479 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 31220232010112 its reverse (21101023202213), we get a palindrome (52321255212325).

The spelling of 31220232010112 in words is "thirty-one trillion, two hundred twenty billion, two hundred thirty-two million, ten thousand, one hundred twelve".