21321302130432 has 54 divisors (see below), whose sum is σ = 61474570341912. Its totient is φ = 7107100709376.

The previous prime is 21321302130431. The next prime is 21321302130437. The reversal of 21321302130432 is 23403120312312.

21321302130432 is a `hidden beast` number, since 2 + 1 + 3 + 2 + 13 + 0 + 213 + 0 + 432 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21321302130396 and 21321302130405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321302130431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4627016388 + ... + 4627020995.

Almost surely, 2^{21321302130432} is an apocalyptic number.

It is an amenable number.

21321302130432 is an abundant number, since it is smaller than the sum of its proper divisors (40153268211480).

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

21321302130432 is an equidigital number, since it uses as much as digits as its factorization.

21321302130432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9254037405 (or 9254037388 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 21321302130432 its reverse (23403120312312), we get a palindrome (44724422442744).

The spelling of 21321302130432 in words is "twenty-one trillion, three hundred twenty-one billion, three hundred two million, one hundred thirty thousand, four hundred thirty-two".