31120120132311 has 16 divisors (see below), whose sum is σ = 47421291456000. Its totient is φ = 17782867283808.

The previous prime is 31120120132291. The next prime is 31120120132313. The reversal of 31120120132311 is 11323102102113.

It is not a de Polignac number, because 31120120132311 - 2⁶ = 31120120132247 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31120120132313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4564990 + ... + 9114788.

It is an arithmetic number, because the mean of its divisors is an integer number (2963830716000).

Almost surely, 2^{31120120132311} is an apocalyptic number.

31120120132311 is a deficient number, since it is larger than the sum of its proper divisors (16301171323689).

31120120132311 is a wasteful number, since it uses less digits than its factorization.

31120120132311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4875518.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 31120120132311 its reverse (11323102102113), we get a palindrome (42443222234424).

The spelling of 31120120132311 in words is "thirty-one trillion, one hundred twenty billion, one hundred twenty million, one hundred thirty-two thousand, three hundred eleven".