223440121 has 2 divisors, whose sum is σ = 223440122. Its totient is φ = 223440120.

The previous prime is 223440089. The next prime is 223440131. The reversal of 223440121 is 121044322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200505600 + 22934521 = 14160^2 + 4789^2 .

It is a cyclic number.

It is not a de Polignac number, because 223440121 - 2⁵ = 223440089 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (223440131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111720060 + 111720061.

It is an arithmetic number, because the mean of its divisors is an integer number (111720061).

Almost surely, 2^223440121 is an apocalyptic number.

It is an amenable number.

223440121 is a deficient number, since it is larger than the sum of its proper divisors (1).

223440121 is an equidigital number, since it uses as much as digits as its factorization.

223440121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 223440121 is about 14947.9136002320. The cubic root of 223440121 is about 606.8113834139.

Adding to 223440121 its reverse (121044322), we get a palindrome (344484443).

The spelling of 223440121 in words is "two hundred twenty-three million, four hundred forty thousand, one hundred twenty-one".