21303222223 has 4 divisors (see below), whose sum is σ = 22556352960. Its totient is φ = 20050091488.

The previous prime is 21303222203. The next prime is 21303222271. The reversal of 21303222223 is 32222230312.

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 21303222223 - 2¹⁷ = 21303091151 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21303222194 and 21303222203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303222203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 626565343 + ... + 626565376.

It is an arithmetic number, because the mean of its divisors is an integer number (5639088240).

Almost surely, 2^21303222223 is an apocalyptic number.

21303222223 is a deficient number, since it is larger than the sum of its proper divisors (1253130737).

21303222223 is a wasteful number, since it uses less digits than its factorization.

21303222223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253130736.

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

Adding to 21303222223 its reverse (32222230312), we get a palindrome (53525452535).

The spelling of 21303222223 in words is "twenty-one billion, three hundred three million, two hundred twenty-two thousand, two hundred twenty-three".