13222244221 has 2 divisors, whose sum is σ = 13222244222. Its totient is φ = 13222244220.

The previous prime is 13222244183. The next prime is 13222244239. The reversal of 13222244221 is 12244222231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13055576121 + 166668100 = 114261^2 + 12910^2 .

It is a cyclic number.

It is not a de Polignac number, because 13222244221 - 2³¹ = 11074760573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13222244251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6611122110 + 6611122111.

It is an arithmetic number, because the mean of its divisors is an integer number (6611122111).

Almost surely, 2^13222244221 is an apocalyptic number.

It is an amenable number.

13222244221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13222244221 is an equidigital number, since it uses as much as digits as its factorization.

13222244221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 25.

Adding to 13222244221 its reverse (12244222231), we get a palindrome (25466466452).

The spelling of 13222244221 in words is "thirteen billion, two hundred twenty-two million, two hundred forty-four thousand, two hundred twenty-one".