12131111240 has 32 divisors (see below), whose sum is σ = 27302530680. Its totient is φ = 4851105792.

The previous prime is 12131111221. The next prime is 12131111263. The reversal of 12131111240 is 4211113121.

It can be written as a sum of positive squares in 4 ways, for example, as 3125480836 + 9005630404 = 55906^2 + 94898^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111944 + ... + 191816.

Almost surely, 2^12131111240 is an apocalyptic number.

12131111240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12131111240 is an abundant number, since it is smaller than the sum of its proper divisors (15171419440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12131111240 is a wasteful number, since it uses less digits than its factorization.

12131111240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83681 (or 83677 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 12131111240 its reverse (4211113121), we get a palindrome (16342224361).

The spelling of 12131111240 in words is "twelve billion, one hundred thirty-one million, one hundred eleven thousand, two hundred forty".