12311303131 has 4 divisors (see below), whose sum is σ = 12495053992. Its totient is φ = 12127552272.

The previous prime is 12311303129. The next prime is 12311303149. The reversal of 12311303131 is 13130311321.

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 12311303131 - 2¹ = 12311303129 is a prime.

It is a super-2 number, since 2×12311303131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12311303099 and 12311303108.

It is not an unprimeable number, because it can be changed into a prime (12311303111) 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, 91875330 + ... + 91875463.

It is an arithmetic number, because the mean of its divisors is an integer number (3123763498).

Almost surely, 2^12311303131 is an apocalyptic number.

12311303131 is a deficient number, since it is larger than the sum of its proper divisors (183750861).

12311303131 is an equidigital number, since it uses as much as digits as its factorization.

12311303131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183750860.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 12311303131 its reverse (13130311321), we get a palindrome (25441614452).

The spelling of 12311303131 in words is "twelve billion, three hundred eleven million, three hundred three thousand, one hundred thirty-one".