31320323111 has 16 divisors (see below), whose sum is σ = 39054174720. Its totient is φ = 24402034080.

The previous prime is 31320323107. The next prime is 31320323143. The reversal of 31320323111 is 11132302313.

It is a cyclic number.

It is not a de Polignac number, because 31320323111 - 2² = 31320323107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31320323011) 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, 621710 + ... + 670196.

It is an arithmetic number, because the mean of its divisors is an integer number (2440885920).

Almost surely, 2^31320323111 is an apocalyptic number.

31320323111 is a deficient number, since it is larger than the sum of its proper divisors (7733851609).

31320323111 is a wasteful number, since it uses less digits than its factorization.

31320323111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56894.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31320323111 its reverse (11132302313), we get a palindrome (42452625424).

The spelling of 31320323111 in words is "thirty-one billion, three hundred twenty million, three hundred twenty-three thousand, one hundred eleven".