31321212011120 has 40 divisors (see below), whose sum is σ = 72823609797216. Its totient is φ = 12528176525568.

The previous prime is 31321212011093. The next prime is 31321212011191. The reversal of 31321212011120 is 2111021212313.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31321212011092 and 31321212011101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1531412 + ... + 8061491.

Almost surely, 2^{31321212011120} is an apocalyptic number.

It is an amenable number.

31321212011120 is an abundant number, since it is smaller than the sum of its proper divisors (41502397786096).

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

31321212011120 is a wasteful number, since it uses less digits than its factorization.

31321212011120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9633729 (or 9633723 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 31321212011120 its reverse (2111021212313), we get a palindrome (33432233223433).

The spelling of 31321212011120 in words is "thirty-one trillion, three hundred twenty-one billion, two hundred twelve million, eleven thousand, one hundred twenty".