12131013240 has 48 divisors (see below), whose sum is σ = 39425794200. Its totient is φ = 3234936768.

The previous prime is 12131013227. The next prime is 12131013269. The reversal of 12131013240 is 4231013121.

It is a super-2 number, since 2×12131013240² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16848270 + ... + 16848989.

Almost surely, 2^12131013240 is an apocalyptic number.

12131013240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12131013240 is an abundant number, since it is smaller than the sum of its proper divisors (27294780960).

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

12131013240 is a wasteful number, since it uses less digits than its factorization.

12131013240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33697276 (or 33697269 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12131013240 its reverse (4231013121), we get a palindrome (16362026361).

The spelling of 12131013240 in words is "twelve billion, one hundred thirty-one million, thirteen thousand, two hundred forty".