31113232120020 has 48 divisors (see below), whose sum is σ = 87122003568768. Its totient is φ = 8296390124160.

The previous prime is 31113232119881. The next prime is 31113232120049. The reversal of 31113232120020 is 2002123231113.

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, 13678336 + ... + 15789975.

It is an arithmetic number, because the mean of its divisors is an integer number (1815041741016).

Almost surely, 2^{31113232120020} is an apocalyptic number.

31113232120020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31113232120020 is an abundant number, since it is smaller than the sum of its proper divisors (56008771448748).

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

31113232120020 is a wasteful number, since it uses less digits than its factorization.

31113232120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29485920 (or 29485918 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31113232120020 its reverse (2002123231113), we get a palindrome (33115355351133).

The spelling of 31113232120020 in words is "thirty-one trillion, one hundred thirteen billion, two hundred thirty-two million, one hundred twenty thousand, twenty".