131321113220 has 48 divisors (see below), whose sum is σ = 305943825600. Its totient is φ = 46943752320.

The previous prime is 131321113193. The next prime is 131321113223. The reversal of 131321113220 is 22311123131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 131321113192 and 131321113201.

It is not an unprimeable number, because it can be changed into a prime (131321113223) 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, 5045615 + ... + 5071574.

It is an arithmetic number, because the mean of its divisors is an integer number (6373829700).

Almost surely, 2^131321113220 is an apocalyptic number.

131321113220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131321113220 is an abundant number, since it is smaller than the sum of its proper divisors (174622712380).

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

131321113220 is a wasteful number, since it uses less digits than its factorization.

131321113220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10117268 (or 10117266 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 131321113220 its reverse (22311123131), we get a palindrome (153632236351).

The spelling of 131321113220 in words is "one hundred thirty-one billion, three hundred twenty-one million, one hundred thirteen thousand, two hundred twenty".