21022233223 has 4 divisors (see below), whose sum is σ = 21230374248. Its totient is φ = 20814092200.

The previous prime is 21022233209. The next prime is 21022233229. The reversal of 21022233223 is 32233222012.

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 21022233223 - 2⁵ = 21022233191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21022233194 and 21022233203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022233229) 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, 104070361 + ... + 104070562.

It is an arithmetic number, because the mean of its divisors is an integer number (5307593562).

Almost surely, 2^21022233223 is an apocalyptic number.

21022233223 is a deficient number, since it is larger than the sum of its proper divisors (208141025).

21022233223 is a wasteful number, since it uses less digits than its factorization.

21022233223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208141024.

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

Adding to 21022233223 its reverse (32233222012), we get a palindrome (53255455235).

The spelling of 21022233223 in words is "twenty-one billion, twenty-two million, two hundred thirty-three thousand, two hundred twenty-three".