131343220320020 has 24 divisors (see below), whose sum is σ = 275963601055968. Its totient is φ = 52510080816800.

The previous prime is 131343220320001. The next prime is 131343220320043. The reversal of 131343220320020 is 20023022343131.

It is a happy number.

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, 1700417366 + ... + 1700494605.

It is an arithmetic number, because the mean of its divisors is an integer number (11498483377332).

Almost surely, 2^{131343220320020} is an apocalyptic number.

131343220320020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131343220320020 is an abundant number, since it is smaller than the sum of its proper divisors (144620380735948).

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

131343220320020 is a wasteful number, since it uses less digits than its factorization.

131343220320020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3400913911 (or 3400913909 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 131343220320020 its reverse (20023022343131), we get a palindrome (151366242663151).

The spelling of 131343220320020 in words is "one hundred thirty-one trillion, three hundred forty-three billion, two hundred twenty million, three hundred twenty thousand, twenty".