223121223 has 20 divisors (see below), whose sum is σ = 358945048. Its totient is φ = 137304720.

The previous prime is 223121207. The next prime is 223121233. The reversal of 223121223 is 322121322.

It is not a de Polignac number, because 223121223 - 2⁴ = 223121207 is a prime.

It is a super-3 number, since 3×223121223³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223121196 and 223121205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223121233) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 104893 + ... + 106998.

Almost surely, 2^223121223 is an apocalyptic number.

223121223 is a deficient number, since it is larger than the sum of its proper divisors (135823825).

223121223 is a wasteful number, since it uses less digits than its factorization.

223121223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211916 (or 211907 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 223121223 is about 14937.2428178697. The cubic root of 223121223 is about 606.5225617085.

Adding to 223121223 its reverse (322121322), we get a palindrome (545242545).

Subtracting 223121223 from its reverse (322121322), we obtain a palindrome (99000099).

The spelling of 223121223 in words is "two hundred twenty-three million, one hundred twenty-one thousand, two hundred twenty-three".