131021231224432 has 20 divisors (see below), whose sum is σ = 268786202291856. Its totient is φ = 61657049987840.

The previous prime is 131021231224363. The next prime is 131021231224463. The reversal of 131021231224432 is 234422132120131.

It is a junction number, because it is equal to n+sod(n) for n = 131021231224394 and 131021231224403.

It is a congruent number.

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, 240847851244 + ... + 240847851787.

Almost surely, 2^{131021231224432} is an apocalyptic number.

It is an amenable number.

131021231224432 is an abundant number, since it is smaller than the sum of its proper divisors (137764971067424).

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

131021231224432 is a wasteful number, since it uses less digits than its factorization.

131021231224432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481695703056 (or 481695703050 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 131021231224432 its reverse (234422132120131), we get a palindrome (365443363344563).

The spelling of 131021231224432 in words is "one hundred thirty-one trillion, twenty-one billion, two hundred thirty-one million, two hundred twenty-four thousand, four hundred thirty-two".