21323202223 has 8 divisors (see below), whose sum is σ = 22547903616. Its totient is φ = 20132054400.

The previous prime is 21323202217. The next prime is 21323202239. The reversal of 21323202223 is 32220232312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21323202223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21323202194 and 21323202203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323202283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8387086 + ... + 8389627.

It is an arithmetic number, because the mean of its divisors is an integer number (2818487952).

Almost surely, 2^21323202223 is an apocalyptic number.

21323202223 is a deficient number, since it is larger than the sum of its proper divisors (1224701393).

21323202223 is a wasteful number, since it uses less digits than its factorization.

21323202223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16776785.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 21323202223 its reverse (32220232312), we get a palindrome (53543434535).

The spelling of 21323202223 in words is "twenty-one billion, three hundred twenty-three million, two hundred two thousand, two hundred twenty-three".