31313010211121 has 4 divisors (see below), whose sum is σ = 31320649398000. Its totient is φ = 31305371024244.

The previous prime is 31313010211079. The next prime is 31313010211157. The reversal of 31313010211121 is 12111201031313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31313010211121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31313010211093 and 31313010211102.

It is not an unprimeable number, because it can be changed into a prime (31313010261121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3819587291 + ... + 3819595488.

It is an arithmetic number, because the mean of its divisors is an integer number (7830162349500).

Almost surely, 2^{31313010211121} is an apocalyptic number.

It is an amenable number.

31313010211121 is a deficient number, since it is larger than the sum of its proper divisors (7639186879).

31313010211121 is an equidigital number, since it uses as much as digits as its factorization.

31313010211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7639186878.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 31313010211121 its reverse (12111201031313), we get a palindrome (43424211242434).

The spelling of 31313010211121 in words is "thirty-one trillion, three hundred thirteen billion, ten million, two hundred eleven thousand, one hundred twenty-one".