131320123020 has 96 divisors (see below), whose sum is σ = 408755289600. Its totient is φ = 35001231552.

The previous prime is 131320123013. The next prime is 131320123049. The reversal of 131320123020 is 20321023131.

131320123020 is a `hidden beast` number, since 1 + 31 + 320 + 12 + 302 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 131320122984 and 131320123002.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1041427 + ... + 1160693.

It is an arithmetic number, because the mean of its divisors is an integer number (4257867600).

Almost surely, 2^131320123020 is an apocalyptic number.

131320123020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131320123020 is an abundant number, since it is smaller than the sum of its proper divisors (277435166580).

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

131320123020 is a wasteful number, since it uses less digits than its factorization.

131320123020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121324 (or 121316 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 131320123020 its reverse (20321023131), we get a palindrome (151641146151).

The spelling of 131320123020 in words is "one hundred thirty-one billion, three hundred twenty million, one hundred twenty-three thousand, twenty".