12311163631 has 4 divisors (see below), whose sum is σ = 13258176232. Its totient is φ = 11364151032.

The previous prime is 12311163619. The next prime is 12311163653. The reversal of 12311163631 is 13636111321.

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

It is not a de Polignac number, because 12311163631 - 2⁹ = 12311163119 is a prime.

It is a super-2 number, since 2×12311163631² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12311163631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311163611) 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, 473506281 + ... + 473506306.

It is an arithmetic number, because the mean of its divisors is an integer number (3314544058).

Almost surely, 2^12311163631 is an apocalyptic number.

12311163631 is a deficient number, since it is larger than the sum of its proper divisors (947012601).

12311163631 is an equidigital number, since it uses as much as digits as its factorization.

12311163631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947012600.

The product of its digits is 1944, while the sum is 28.

Adding to 12311163631 its reverse (13636111321), we get a palindrome (25947274952).

The spelling of 12311163631 in words is "twelve billion, three hundred eleven million, one hundred sixty-three thousand, six hundred thirty-one".