31011231102020 has 96 divisors (see below), whose sum is σ = 73184960927232. Its totient is φ = 10952071815168.

The previous prime is 31011231101989. The next prime is 31011231102077. The reversal of 31011231102020 is 2020113211013.

It is a self number, because there is not a number n which added to its sum of digits gives 31011231102020.

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, 206731364 + ... + 206881316.

It is an arithmetic number, because the mean of its divisors is an integer number (762343342992).

Almost surely, 2^{31011231102020} is an apocalyptic number.

It is an amenable number.

31011231102020 is an abundant number, since it is smaller than the sum of its proper divisors (42173729825212).

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

31011231102020 is a wasteful number, since it uses less digits than its factorization.

31011231102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184581 (or 184579 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 31011231102020 its reverse (2020113211013), we get a palindrome (33031344313033).

The spelling of 31011231102020 in words is "thirty-one trillion, eleven billion, two hundred thirty-one million, one hundred two thousand, twenty".