21201230332 has 48 divisors (see below), whose sum is σ = 42778260000. Its totient is φ = 9125996544.

The previous prime is 21201230327. The next prime is 21201230359. The reversal of 21201230332 is 23303210212.

It is a Harshad number since it is a multiple of its sum of digits (19).

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, 245457 + ... + 320392.

It is an arithmetic number, because the mean of its divisors is an integer number (891213750).

Almost surely, 2^21201230332 is an apocalyptic number.

It is an amenable number.

21201230332 is an abundant number, since it is smaller than the sum of its proper divisors (21577029668).

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

21201230332 is a wasteful number, since it uses less digits than its factorization.

21201230332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565918 (or 565916 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21201230332 its reverse (23303210212), we get a palindrome (44504440544).

The spelling of 21201230332 in words is "twenty-one billion, two hundred one million, two hundred thirty thousand, three hundred thirty-two".