31112111013020 has 48 divisors (see below), whose sum is σ = 65606753737728. Its totient is φ = 12393269878080.

The previous prime is 31112111013001. The next prime is 31112111013037. The reversal of 31112111013020 is 2031011121113.

It is a super-4 number, since 4×31112111013020⁴ (a number of 55 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31112111013020.

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, 1415969 + ... + 8014311.

It is an arithmetic number, because the mean of its divisors is an integer number (1366807369536).

Almost surely, 2^{31112111013020} is an apocalyptic number.

It is an amenable number.

31112111013020 is an abundant number, since it is smaller than the sum of its proper divisors (34494642724708).

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

31112111013020 is a wasteful number, since it uses less digits than its factorization.

31112111013020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6599330 (or 6599328 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 31112111013020 its reverse (2031011121113), we get a palindrome (33143122134133).

The spelling of 31112111013020 in words is "thirty-one trillion, one hundred twelve billion, one hundred eleven million, thirteen thousand, twenty".