31120130013012 has 18 divisors (see below), whose sum is σ = 78664773088538. Its totient is φ = 10373376670992.

The previous prime is 31120130012957. The next prime is 31120130013017. The reversal of 31120130013012 is 21031003102113.

31120130013012 is a `hidden beast` number, since 31 + 1 + 201 + 300 + 130 + 1 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 30776598047556 + 343531965456 = 5547666^2 + 586116^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-3 number, since 3×31120130013012³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31120130013017) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 432224027923 + ... + 432224027994.

Almost surely, 2^{31120130013012} is an apocalyptic number.

It is an amenable number.

31120130013012 is an abundant number, since it is smaller than the sum of its proper divisors (47544643075526).

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

31120130013012 is a wasteful number, since it uses less digits than its factorization.

31120130013012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864448055927 (or 864448055922 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 31120130013012 its reverse (21031003102113), we get a palindrome (52151133115125).

The spelling of 31120130013012 in words is "thirty-one trillion, one hundred twenty billion, one hundred thirty million, thirteen thousand, twelve".