131232021320 has 16 divisors (see below), whose sum is σ = 295272048060. Its totient is φ = 52492808512.

The previous prime is 131232021313. The next prime is 131232021331. The reversal of 131232021320 is 23120232131.

It can be written as a sum of positive squares in 2 ways, for example, as 131091788356 + 140232964 = 362066^2 + 11842^2 .

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 = 131232021292 and 131232021301.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1640400227 + ... + 1640400306.

Almost surely, 2^131232021320 is an apocalyptic number.

131232021320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131232021320 is an abundant number, since it is smaller than the sum of its proper divisors (164040026740).

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

131232021320 is a wasteful number, since it uses less digits than its factorization.

131232021320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3280800544 (or 3280800540 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 131232021320 its reverse (23120232131), we get a palindrome (154352253451).

The spelling of 131232021320 in words is "one hundred thirty-one billion, two hundred thirty-two million, twenty-one thousand, three hundred twenty".