224111111221 has 2 divisors, whose sum is σ = 224111111222. Its totient is φ = 224111111220.

The previous prime is 224111111209. The next prime is 224111111227. The reversal of 224111111221 is 122111111422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196413830596 + 27697280625 = 443186^2 + 166425^2 .

It is a cyclic number.

It is not a de Polignac number, because 224111111221 - 2⁹ = 224111110709 is a prime.

It is a super-2 number, since 2×224111111221² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (224111111227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112055555610 + 112055555611.

It is an arithmetic number, because the mean of its divisors is an integer number (112055555611).

Almost surely, 2^224111111221 is an apocalyptic number.

It is an amenable number.

224111111221 is a deficient number, since it is larger than the sum of its proper divisors (1).

224111111221 is an equidigital number, since it uses as much as digits as its factorization.

224111111221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64, while the sum is 19.

Adding to 224111111221 its reverse (122111111422), we get a palindrome (346222222643).

The spelling of 224111111221 in words is "two hundred twenty-four billion, one hundred eleven million, one hundred eleven thousand, two hundred twenty-one".