223122121 has 4 divisors (see below), whose sum is σ = 223326612. Its totient is φ = 222917632.

The previous prime is 223122083. The next prime is 223122169. The reversal of 223122121 is 121221322.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60840000 + 162282121 = 7800^2 + 12739^2 .

It is a cyclic number.

It is not a de Polignac number, because 223122121 - 2¹⁹ = 222597833 is a prime.

It is a super-3 number, since 3×223122121³ (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 = 223122095 and 223122104.

It is not an unprimeable number, because it can be changed into a prime (223122181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100600 + ... + 102793.

It is an arithmetic number, because the mean of its divisors is an integer number (55831653).

Almost surely, 2^223122121 is an apocalyptic number.

It is an amenable number.

223122121 is a deficient number, since it is larger than the sum of its proper divisors (204491).

223122121 is a wasteful number, since it uses less digits than its factorization.

223122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204490.

The product of its digits is 96, while the sum is 16.

The square root of 223122121 is about 14937.2728769344. The cubic root of 223122121 is about 606.5233754015.

Adding to 223122121 its reverse (121221322), we get a palindrome (344343443).

The spelling of 223122121 in words is "two hundred twenty-three million, one hundred twenty-two thousand, one hundred twenty-one".