131131244242421 has 32 divisors (see below), whose sum is σ = 135457929953280. Its totient is φ = 126877374311296.

The previous prime is 131131244242417. The next prime is 131131244242459. The reversal of 131131244242421 is 124242442131131.

It is a happy number.

It is not a de Polignac number, because 131131244242421 - 2² = 131131244242417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131131244242121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1625143940 + ... + 1625224626.

It is an arithmetic number, because the mean of its divisors is an integer number (4233060311040).

Almost surely, 2^{131131244242421} is an apocalyptic number.

It is an amenable number.

131131244242421 is a deficient number, since it is larger than the sum of its proper divisors (4326685710859).

131131244242421 is a wasteful number, since it uses less digits than its factorization.

131131244242421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81913.

The product of its digits is 36864, while the sum is 35.

Adding to 131131244242421 its reverse (124242442131131), we get a palindrome (255373686373552).

The spelling of 131131244242421 in words is "one hundred thirty-one trillion, one hundred thirty-one billion, two hundred forty-four million, two hundred forty-two thousand, four hundred twenty-one".