21231330312032 has 96 divisors (see below), whose sum is σ = 42790671705600. Its totient is φ = 10367100476928.

The previous prime is 21231330312013. The next prime is 21231330312043. The reversal of 21231330312032 is 23021303313212.

It is a junction number, because it is equal to n+sod(n) for n = 21231330311992 and 21231330312010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173867894 + ... + 173989962.

It is an arithmetic number, because the mean of its divisors is an integer number (445736163600).

Almost surely, 2^{21231330312032} is an apocalyptic number.

It is an amenable number.

21231330312032 is an abundant number, since it is smaller than the sum of its proper divisors (21559341393568).

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

21231330312032 is a wasteful number, since it uses less digits than its factorization.

21231330312032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122908 (or 122900 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 21231330312032 its reverse (23021303313212), we get a palindrome (44252633625244).

The spelling of 21231330312032 in words is "twenty-one trillion, two hundred thirty-one billion, three hundred thirty million, three hundred twelve thousand, thirty-two".