12131122311 has 48 divisors (see below), whose sum is σ = 21861036288. Its totient is φ = 6297696000.

The previous prime is 12131122303. The next prime is 12131122313. The reversal of 12131122311 is 11322113121.

12131122311 is a `hidden beast` number, since 1 + 21 + 311 + 22 + 311 = 666.

It is not a de Polignac number, because 12131122311 - 2³ = 12131122303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131122313) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1226536 + ... + 1236386.

It is an arithmetic number, because the mean of its divisors is an integer number (455438256).

Almost surely, 2^12131122311 is an apocalyptic number.

12131122311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12131122311 is a deficient number, since it is larger than the sum of its proper divisors (9729913977).

12131122311 is a wasteful number, since it uses less digits than its factorization.

12131122311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11652 (or 11649 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 12131122311 its reverse (11322113121), we get a palindrome (23453235432).

The spelling of 12131122311 in words is "twelve billion, one hundred thirty-one million, one hundred twenty-two thousand, three hundred eleven".