31331320112120 has 128 divisors (see below), whose sum is σ = 82676345673600. Its totient is φ = 10461742080000.

The previous prime is 31331320112117. The next prime is 31331320112153. The reversal of 31331320112120 is 2121102313313.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4133870 + ... + 8930370.

It is an arithmetic number, because the mean of its divisors is an integer number (645908950575).

Almost surely, 2^{31331320112120} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31331320112120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41338172836800).

31331320112120 is an abundant number, since it is smaller than the sum of its proper divisors (51345025561480).

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

31331320112120 is a wasteful number, since it uses less digits than its factorization.

31331320112120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4797129 (or 4797125 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 31331320112120 its reverse (2121102313313), we get a palindrome (33452422425433).

The spelling of 31331320112120 in words is "thirty-one trillion, three hundred thirty-one billion, three hundred twenty million, one hundred twelve thousand, one hundred twenty".