312231312311 has 4 divisors (see below), whose sum is σ = 330597860112. Its totient is φ = 293864764512.

The previous prime is 312231312299. The next prime is 312231312353. The reversal of 312231312311 is 113213132213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 312231312311 - 2¹⁸ = 312231050167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312231312011) 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, 9183273875 + ... + 9183273908.

It is an arithmetic number, because the mean of its divisors is an integer number (82649465028).

Almost surely, 2^312231312311 is an apocalyptic number.

312231312311 is a deficient number, since it is larger than the sum of its proper divisors (18366547801).

312231312311 is a wasteful number, since it uses less digits than its factorization.

312231312311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18366547800.

The product of its digits is 648, while the sum is 23.

Adding to 312231312311 its reverse (113213132213), we get a palindrome (425444444524).

The spelling of 312231312311 in words is "three hundred twelve billion, two hundred thirty-one million, three hundred twelve thousand, three hundred eleven".