12312311311 has 4 divisors (see below), whose sum is σ = 12736873800. Its totient is φ = 11887748824.

The previous prime is 12312311299. The next prime is 12312311329. The reversal of 12312311311 is 11311321321.

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 12312311311 - 2⁹ = 12312310799 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 (12312311371) 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, 212281201 + ... + 212281258.

It is an arithmetic number, because the mean of its divisors is an integer number (3184218450).

Almost surely, 2^12312311311 is an apocalyptic number.

12312311311 is a deficient number, since it is larger than the sum of its proper divisors (424562489).

12312311311 is an equidigital number, since it uses as much as digits as its factorization.

12312311311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424562488.

The product of its digits is 108, while the sum is 19.

Adding to 12312311311 its reverse (11311321321), we get a palindrome (23623632632).

The spelling of 12312311311 in words is "twelve billion, three hundred twelve million, three hundred eleven thousand, three hundred eleven".