12311131 has 8 divisors (see below), whose sum is σ = 14104800. Its totient is φ = 10526208.

The previous prime is 12311119. The next prime is 12311137. The reversal of 12311131 is 13111321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12311131 - 2¹¹ = 12309083 is a prime.

It is a super-2 number, since 2×12311131² = 303127892998322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12311137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1185 + ... + 5101.

It is an arithmetic number, because the mean of its divisors is an integer number (1763100).

Almost surely, 2^12311131 is an apocalyptic number.

12311131 is a deficient number, since it is larger than the sum of its proper divisors (1793669).

12311131 is an equidigital number, since it uses as much as digits as its factorization.

12311131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4373.

The product of its digits is 18, while the sum is 13.

The square root of 12311131 is about 3508.7221320589. The cubic root of 12311131 is about 230.9046350856.

Adding to 12311131 its reverse (13111321), we get a palindrome (25422452).

It can be divided in two parts, 1 and 2311131, that added together give a palindrome (2311132).

The spelling of 12311131 in words is "twelve million, three hundred eleven thousand, one hundred thirty-one".