31120023001212 has 18 divisors (see below), whose sum is σ = 78664502586488. Its totient is φ = 10373341000392.

The previous prime is 31120023001211. The next prime is 31120023001231. The reversal of 31120023001212 is 21210032002113.

31120023001212 is a `hidden beast` number, since 31 + 120 + 0 + 2 + 300 + 1 + 212 = 666.

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

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 (31120023001211) 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, 432222541648 + ... + 432222541719.

Almost surely, 2^{31120023001212} is an apocalyptic number.

It is an amenable number.

31120023001212 is an abundant number, since it is smaller than the sum of its proper divisors (47544479585276).

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

31120023001212 is a wasteful number, since it uses less digits than its factorization.

31120023001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864445083377 (or 864445083372 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 31120023001212 its reverse (21210032002113), we get a palindrome (52330055003325).

Subtracting from 31120023001212 its reverse (21210032002113), we obtain a palindrome (9909990999099).

The spelling of 31120023001212 in words is "thirty-one trillion, one hundred twenty billion, twenty-three million, one thousand, two hundred twelve".