31161143411321 has 64 divisors (see below), whose sum is σ = 40293342867456. Its totient is φ = 23394456729600.

The previous prime is 31161143411261. The next prime is 31161143411339. The reversal of 31161143411321 is 12311434116113.

It is not a de Polignac number, because 31161143411321 - 2²² = 31161139217017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31161143413321) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 697766225 + ... + 697810881.

It is an arithmetic number, because the mean of its divisors is an integer number (629583482304).

Almost surely, 2^{31161143411321} is an apocalyptic number.

It is an amenable number.

31161143411321 is a deficient number, since it is larger than the sum of its proper divisors (9132199456135).

31161143411321 is a wasteful number, since it uses less digits than its factorization.

31161143411321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47462.

The product of its digits is 5184, while the sum is 32.

Adding to 31161143411321 its reverse (12311434116113), we get a palindrome (43472577527434).

The spelling of 31161143411321 in words is "thirty-one trillion, one hundred sixty-one billion, one hundred forty-three million, four hundred eleven thousand, three hundred twenty-one".