223440121211 has 2 divisors, whose sum is σ = 223440121212. Its totient is φ = 223440121210.

The previous prime is 223440121207. The next prime is 223440121237. The reversal of 223440121211 is 112121044322.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 223440121211 - 2² = 223440121207 is a prime.

It is not a weakly prime, because it can be changed into another prime (223440121111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111720060605 + 111720060606.

It is an arithmetic number, because the mean of its divisors is an integer number (111720060606).

Almost surely, 2^223440121211 is an apocalyptic number.

223440121211 is a deficient number, since it is larger than the sum of its proper divisors (1).

223440121211 is an equidigital number, since it uses as much as digits as its factorization.

223440121211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 223440121211 its reverse (112121044322), we get a palindrome (335561165533).

The spelling of 223440121211 in words is "two hundred twenty-three billion, four hundred forty million, one hundred twenty-one thousand, two hundred eleven".