21223113223 has 4 divisors (see below), whose sum is σ = 22855660408. Its totient is φ = 19590566040.

The previous prime is 21223113179. The next prime is 21223113253. The reversal of 21223113223 is 32231132212.

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 21223113223 - 2³³ = 12633178631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21223113194 and 21223113203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223113253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 816273573 + ... + 816273598.

It is an arithmetic number, because the mean of its divisors is an integer number (5713915102).

Almost surely, 2^21223113223 is an apocalyptic number.

21223113223 is a deficient number, since it is larger than the sum of its proper divisors (1632547185).

21223113223 is a wasteful number, since it uses less digits than its factorization.

21223113223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632547184.

The product of its digits is 864, while the sum is 22.

Adding to 21223113223 its reverse (32231132212), we get a palindrome (53454245435).

The spelling of 21223113223 in words is "twenty-one billion, two hundred twenty-three million, one hundred thirteen thousand, two hundred twenty-three".