12531131501140 has 96 divisors (see below), whose sum is σ = 31849072867584. Its totient is φ = 4042991769600.

The previous prime is 12531131501137. The next prime is 12531131501159. The reversal of 12531131501140 is 4110513113521.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 12531131501099 and 12531131501108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14088879 + ... + 14951881.

It is an arithmetic number, because the mean of its divisors is an integer number (331761175704).

Almost surely, 2^{12531131501140} is an apocalyptic number.

12531131501140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12531131501140 is an abundant number, since it is smaller than the sum of its proper divisors (19317941366444).

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

12531131501140 is a wasteful number, since it uses less digits than its factorization.

12531131501140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869137 (or 869135 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 28.

Adding to 12531131501140 its reverse (4110513113521), we get a palindrome (16641644614661).

The spelling of 12531131501140 in words is "twelve trillion, five hundred thirty-one billion, one hundred thirty-one million, five hundred one thousand, one hundred forty".