312121323311 has 32 divisors (see below), whose sum is σ = 379520908800. Its totient is φ = 250734476160.

The previous prime is 312121323289. The next prime is 312121323343. The reversal of 312121323311 is 113323121213.

It is not a de Polignac number, because 312121323311 - 2¹⁰ = 312121322287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312121383311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9450056 + ... + 9483026.

It is an arithmetic number, because the mean of its divisors is an integer number (11860028400).

Almost surely, 2^312121323311 is an apocalyptic number.

312121323311 is a deficient number, since it is larger than the sum of its proper divisors (67399585489).

312121323311 is a wasteful number, since it uses less digits than its factorization.

312121323311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33759.

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

Adding to 312121323311 its reverse (113323121213), we get a palindrome (425444444524).

The spelling of 312121323311 in words is "three hundred twelve billion, one hundred twenty-one million, three hundred twenty-three thousand, three hundred eleven".