11111324221 has 2 divisors, whose sum is σ = 11111324222. Its totient is φ = 11111324220.

The previous prime is 11111324209. The next prime is 11111324243. The reversal of 11111324221 is 12242311111.

11111324221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10535996025 + 575328196 = 102645^2 + 23986^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111324221 - 2²¹ = 11109227069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111324251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555662110 + 5555662111.

It is an arithmetic number, because the mean of its divisors is an integer number (5555662111).

Almost surely, 2^11111324221 is an apocalyptic number.

It is an amenable number.

11111324221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111324221 is an equidigital number, since it uses as much as digits as its factorization.

11111324221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96, while the sum is 19.

Adding to 11111324221 its reverse (12242311111), we get a palindrome (23353635332).

The spelling of 11111324221 in words is "eleven billion, one hundred eleven million, three hundred twenty-four thousand, two hundred twenty-one".