31110201997820 has 48 divisors (see below), whose sum is σ = 71859658229856. Its totient is φ = 11312800716800.

The previous prime is 31110201997817. The next prime is 31110201997871. The reversal of 31110201997820 is 2879910201113.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 584312261 + ... + 584365500.

It is an arithmetic number, because the mean of its divisors is an integer number (1497076213122).

Almost surely, 2^{31110201997820} is an apocalyptic number.

It is an amenable number.

31110201997820 is an abundant number, since it is smaller than the sum of its proper divisors (40749456232036).

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

31110201997820 is a wasteful number, since it uses less digits than its factorization.

31110201997820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1168677803 (or 1168677779 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 44.

The spelling of 31110201997820 in words is "thirty-one trillion, one hundred ten billion, two hundred one million, nine hundred ninety-seven thousand, eight hundred twenty".