21233223203 has 4 divisors (see below), whose sum is σ = 21234668568. Its totient is φ = 21231777840.

The previous prime is 21233223181. The next prime is 21233223251. The reversal of 21233223203 is 30232233212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21233223203 - 2²⁰ = 21232174627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21233229203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 700418 + ... + 730103.

It is an arithmetic number, because the mean of its divisors is an integer number (5308667142).

Almost surely, 2^21233223203 is an apocalyptic number.

21233223203 is a deficient number, since it is larger than the sum of its proper divisors (1445365).

21233223203 is a wasteful number, since it uses less digits than its factorization.

21233223203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445364.

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 21233223203 its reverse (30232233212), we get a palindrome (51465456415).

The spelling of 21233223203 in words is "twenty-one billion, two hundred thirty-three million, two hundred twenty-three thousand, two hundred three".