12131240140 has 24 divisors (see below), whose sum is σ = 25589854080. Its totient is φ = 4830734208.

The previous prime is 12131240123. The next prime is 12131240161. The reversal of 12131240140 is 4104213121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1355545 + ... + 1364464.

It is an arithmetic number, because the mean of its divisors is an integer number (1066243920).

Almost surely, 2^12131240140 is an apocalyptic number.

12131240140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12131240140 is an abundant number, since it is smaller than the sum of its proper divisors (13458613940).

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

12131240140 is a wasteful number, since it uses less digits than its factorization.

12131240140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2720241 (or 2720239 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 12131240140 its reverse (4104213121), we get a palindrome (16235453261).

The spelling of 12131240140 in words is "twelve billion, one hundred thirty-one million, two hundred forty thousand, one hundred forty".