21302232223 has 8 divisors (see below), whose sum is σ = 22426367600. Its totient is φ = 20178393408.

The previous prime is 21302232163. The next prime is 21302232241. The reversal of 21302232223 is 32223220312.

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

It is a cyclic number.

It is not a de Polignac number, because 21302232223 - 2⁹ = 21302231711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21302232194 and 21302232203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302242223) 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, 81733 + ... + 222001.

It is an arithmetic number, because the mean of its divisors is an integer number (2803295950).

Almost surely, 2^21302232223 is an apocalyptic number.

21302232223 is a deficient number, since it is larger than the sum of its proper divisors (1124135377).

21302232223 is a wasteful number, since it uses less digits than its factorization.

21302232223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148281.

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

Adding to 21302232223 its reverse (32223220312), we get a palindrome (53525452535).

The spelling of 21302232223 in words is "twenty-one billion, three hundred two million, two hundred thirty-two thousand, two hundred twenty-three".