31012211101020 has 96 divisors (see below), whose sum is σ = 86873158229760. Its totient is φ = 8266212702720.

The previous prime is 31012211101009. The next prime is 31012211101061. The reversal of 31012211101020 is 2010111221013.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 2099526235 + ... + 2099541005.

It is an arithmetic number, because the mean of its divisors is an integer number (904928731560).

Almost surely, 2^{31012211101020} is an apocalyptic number.

31012211101020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31012211101020 is an abundant number, since it is smaller than the sum of its proper divisors (55860947128740).

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

31012211101020 is a wasteful number, since it uses less digits than its factorization.

31012211101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28115 (or 28113 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 31012211101020 its reverse (2010111221013), we get a palindrome (33022322322033).

The spelling of 31012211101020 in words is "thirty-one trillion, twelve billion, two hundred eleven million, one hundred one thousand, twenty".