21231430230332 has 12 divisors (see below), whose sum is σ = 42462860460720. Its totient is φ = 9099184384416.

The previous prime is 21231430230331. The next prime is 21231430230377. The reversal of 21231430230332 is 23303203413212.

It is a happy number.

21231430230332 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21231430230295 and 21231430230304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231430230331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 379132682657 + ... + 379132682712.

It is an arithmetic number, because the mean of its divisors is an integer number (3538571705060).

Almost surely, 2^{21231430230332} is an apocalyptic number.

It is an amenable number.

21231430230332 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21231430230332 is a wasteful number, since it uses less digits than its factorization.

21231430230332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758265365380 (or 758265365378 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 29.

Adding to 21231430230332 its reverse (23303203413212), we get a palindrome (44534633643544).

The spelling of 21231430230332 in words is "twenty-one trillion, two hundred thirty-one billion, four hundred thirty million, two hundred thirty thousand, three hundred thirty-two".