131321122320 has 80 divisors (see below), whose sum is σ = 407213847360. Its totient is φ = 35008783872.

The previous prime is 131321122307. The next prime is 131321122321. The reversal of 131321122320 is 23221123131.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (131321122321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 766291 + ... + 921869.

It is an arithmetic number, because the mean of its divisors is an integer number (5090173092).

Almost surely, 2^131321122320 is an apocalyptic number.

131321122320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131321122320 is an abundant number, since it is smaller than the sum of its proper divisors (275892725040).

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

131321122320 is a wasteful number, since it uses less digits than its factorization.

131321122320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159112 (or 159106 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 131321122320 its reverse (23221123131), we get a palindrome (154542245451).

The spelling of 131321122320 in words is "one hundred thirty-one billion, three hundred twenty-one million, one hundred twenty-two thousand, three hundred twenty".