21223332232 has 8 divisors (see below), whose sum is σ = 39793747950. Its totient is φ = 10611666112.

The previous prime is 21223332227. The next prime is 21223332301. The reversal of 21223332232 is 23223332212.

It can be written as a sum of positive squares in only one way, i.e., 17454108996 + 3769223236 = 132114^2 + 61394^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21223332197 and 21223332206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1326458257 + ... + 1326458272.

Almost surely, 2^21223332232 is an apocalyptic number.

It is an amenable number.

21223332232 is a deficient number, since it is larger than the sum of its proper divisors (18570415718).

21223332232 is a wasteful number, since it uses less digits than its factorization.

21223332232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2652916535 (or 2652916531 counting only the distinct ones).

The product of its digits is 5184, while the sum is 25.

Adding to 21223332232 its reverse (23223332212), we get a palindrome (44446664444).

The spelling of 21223332232 in words is "twenty-one billion, two hundred twenty-three million, three hundred thirty-two thousand, two hundred thirty-two".