223222121 has 8 divisors (see below), whose sum is σ = 238446504. Its totient is φ = 208230400.

The previous prime is 223222099. The next prime is 223222133. The reversal of 223222121 is 121222322.

223222121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3115225 + 220106896 = 1765^2 + 14836^2 .

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 223222121 - 2²² = 219027817 is a prime.

It is a super-3 number, since 3×223222121³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 223222121.

It is not an unprimeable number, because it can be changed into a prime (223222141) 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, 56180 + ... + 60021.

It is an arithmetic number, because the mean of its divisors is an integer number (29805813).

Almost surely, 2^223222121 is an apocalyptic number.

It is an amenable number.

223222121 is a deficient number, since it is larger than the sum of its proper divisors (15224383).

223222121 is a wasteful number, since it uses less digits than its factorization.

223222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116331.

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

The square root of 223222121 is about 14940.6198331930. The cubic root of 223222121 is about 606.6139734386.

Adding to 223222121 its reverse (121222322), we get a palindrome (344444443).

The spelling of 223222121 in words is "two hundred twenty-three million, two hundred twenty-two thousand, one hundred twenty-one".