31112343321 has 4 divisors (see below), whose sum is σ = 41483124432. Its totient is φ = 20741562212.

The previous prime is 31112343257. The next prime is 31112343343. The reversal of 31112343321 is 12334321113.

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 not a de Polignac number, because 31112343321 - 2⁶ = 31112343257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31112343291 and 31112343300.

It is not an unprimeable number, because it can be changed into a prime (31112323321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5185390551 + ... + 5185390556.

It is an arithmetic number, because the mean of its divisors is an integer number (10370781108).

Almost surely, 2^31112343321 is an apocalyptic number.

It is an amenable number.

31112343321 is a deficient number, since it is larger than the sum of its proper divisors (10370781111).

31112343321 is a wasteful number, since it uses less digits than its factorization.

31112343321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10370781110.

The product of its digits is 1296, while the sum is 24.

Adding to 31112343321 its reverse (12334321113), we get a palindrome (43446664434).

It can be divided in two parts, 3111 and 2343321, that added together give a palindrome (2346432).

The spelling of 31112343321 in words is "thirty-one billion, one hundred twelve million, three hundred forty-three thousand, three hundred twenty-one".