21201330232 has 8 divisors (see below), whose sum is σ = 39752494200. Its totient is φ = 10600665112.

The previous prime is 21201330229. The next prime is 21201330259. The reversal of 21201330232 is 23203310212.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1325083132 + ... + 1325083147.

It is an arithmetic number, because the mean of its divisors is an integer number (4969061775).

Almost surely, 2^21201330232 is an apocalyptic number.

It is an amenable number.

21201330232 is a deficient number, since it is larger than the sum of its proper divisors (18551163968).

21201330232 is a wasteful number, since it uses less digits than its factorization.

21201330232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2650166285 (or 2650166281 counting only the distinct ones).

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

Adding to 21201330232 its reverse (23203310212), we get a palindrome (44404640444).

The spelling of 21201330232 in words is "twenty-one billion, two hundred one million, three hundred thirty thousand, two hundred thirty-two".