21233321232 has 80 divisors (see below), whose sum is σ = 58102209792. Its totient is φ = 6658816000.

The previous prime is 21233321191. The next prime is 21233321233. The reversal of 21233321232 is 23212333212.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (21233321233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3874078 + ... + 3879554.

Almost surely, 2^21233321232 is an apocalyptic number.

It is an amenable number.

21233321232 is an abundant number, since it is smaller than the sum of its proper divisors (36868888560).

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

21233321232 is a wasteful number, since it uses less digits than its factorization.

21233321232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10256 (or 10250 counting only the distinct ones).

The product of its digits is 2592, while the sum is 24.

Adding to 21233321232 its reverse (23212333212), we get a palindrome (44445654444).

The spelling of 21233321232 in words is "twenty-one billion, two hundred thirty-three million, three hundred twenty-one thousand, two hundred thirty-two".