21303110223 has 12 divisors (see below), whose sum is σ = 31230431128. Its totient is φ = 13990101840.

The previous prime is 21303110219. The next prime is 21303110237. The reversal of 21303110223 is 32201130312.

21303110223 is a `hidden beast` number, since 2 + 130 + 311 + 0 + 223 = 666.

It is not a de Polignac number, because 21303110223 - 2² = 21303110219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21303110196 and 21303110205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303110263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17663668 + ... + 17664873.

Almost surely, 2^21303110223 is an apocalyptic number.

21303110223 is a deficient number, since it is larger than the sum of its proper divisors (9927320905).

21303110223 is a wasteful number, since it uses less digits than its factorization.

21303110223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35328614 (or 35328611 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21303110223 its reverse (32201130312), we get a palindrome (53504240535).

The spelling of 21303110223 in words is "twenty-one billion, three hundred three million, one hundred ten thousand, two hundred twenty-three".