223122221 has 8 divisors (see below), whose sum is σ = 263222784. Its totient is φ = 185078160.

The previous prime is 223122203. The next prime is 223122223. The reversal of 223122221 is 122221322.

223122221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 223122221 - 2¹⁴ = 223105837 is a prime.

It is a super-3 number, since 3×223122221³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 223122221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223122223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 513890 + ... + 514323.

It is an arithmetic number, because the mean of its divisors is an integer number (32902848).

Almost surely, 2^223122221 is an apocalyptic number.

It is an amenable number.

223122221 is a deficient number, since it is larger than the sum of its proper divisors (40100563).

223122221 is a wasteful number, since it uses less digits than its factorization.

223122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028251.

The product of its digits is 192, while the sum is 17.

The square root of 223122221 is about 14937.2762242653. The cubic root of 223122221 is about 606.5234660130.

Adding to 223122221 its reverse (122221322), we get a palindrome (345343543).

The spelling of 223122221 in words is "two hundred twenty-three million, one hundred twenty-two thousand, two hundred twenty-one".