31020011131120 has 80 divisors (see below), whose sum is σ = 78737321346048. Its totient is φ = 11271503243520.

The previous prime is 31020011131073. The next prime is 31020011131133. The reversal of 31020011131120 is 2113111002013.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 31020011131094 and 31020011131103.

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, 12114084 + ... + 14449603.

Almost surely, 2^{31020011131120} is an apocalyptic number.

It is an amenable number.

31020011131120 is an abundant number, since it is smaller than the sum of its proper divisors (47717310214928).

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

31020011131120 is a wasteful number, since it uses less digits than its factorization.

31020011131120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26565038 (or 26565032 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 31020011131120 its reverse (2113111002013), we get a palindrome (33133122133133).

The spelling of 31020011131120 in words is "thirty-one trillion, twenty billion, eleven million, one hundred thirty-one thousand, one hundred twenty".