21303232012 has 6 divisors (see below), whose sum is σ = 37280656028. Its totient is φ = 10651616004.

The previous prime is 21303231979. The next prime is 21303232021. The reversal of 21303232012 is 21023230312.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2662903998 + ... + 2662904005.

Almost surely, 2^21303232012 is an apocalyptic number.

It is an amenable number.

21303232012 is a deficient number, since it is larger than the sum of its proper divisors (15977424016).

21303232012 is a wasteful number, since it uses less digits than its factorization.

21303232012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5325808007 (or 5325808005 counting only the distinct ones).

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

Adding to 21303232012 its reverse (21023230312), we get a palindrome (42326462324).

The spelling of 21303232012 in words is "twenty-one billion, three hundred three million, two hundred thirty-two thousand, twelve".