131251225421240 has 32 divisors (see below), whose sum is σ = 295317333617760. Its totient is φ = 52500121027200.

The previous prime is 131251225421227. The next prime is 131251225421263. The reversal of 131251225421240 is 42124522152131.

It is a self number, because there is not a number n which added to its sum of digits gives 131251225421240.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5739671 + ... + 17188550.

It is an arithmetic number, because the mean of its divisors is an integer number (9228666675555).

Almost surely, 2^{131251225421240} is an apocalyptic number.

131251225421240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131251225421240 is an abundant number, since it is smaller than the sum of its proper divisors (164066108196520).

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

131251225421240 is a wasteful number, since it uses less digits than its factorization.

131251225421240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23071343 (or 23071339 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 35.

Adding to 131251225421240 its reverse (42124522152131), we get a palindrome (173375747573371).

The spelling of 131251225421240 in words is "one hundred thirty-one trillion, two hundred fifty-one billion, two hundred twenty-five million, four hundred twenty-one thousand, two hundred forty".