131321443404420 has 144 divisors (see below), whose sum is σ = 398662595538480. Its totient is φ = 34990848442368.

The previous prime is 131321443404419. The next prime is 131321443404427. The reversal of 131321443404420 is 24404344123131.

131321443404420 is a `hidden beast` number, since 1 + 3 + 1 + 3 + 214 + 434 + 0 + 4 + 4 + 2 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 448621323264 + 130872822081156 = 669792^2 + 11439966^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (131321443404427) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2304139444 + ... + 2304196436.

It is an arithmetic number, because the mean of its divisors is an integer number (2768490246795).

Almost surely, 2^{131321443404420} is an apocalyptic number.

131321443404420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131321443404420 is an abundant number, since it is smaller than the sum of its proper divisors (267341152134060).

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

131321443404420 is a wasteful number, since it uses less digits than its factorization.

131321443404420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67094 (or 67089 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

Adding to 131321443404420 its reverse (24404344123131), we get a palindrome (155725787527551).

The spelling of 131321443404420 in words is "one hundred thirty-one trillion, three hundred twenty-one billion, four hundred forty-three million, four hundred four thousand, four hundred twenty".