222221122213 has 2 divisors, whose sum is σ = 222221122214. Its totient is φ = 222221122212.

The previous prime is 222221122177. The next prime is 222221122247. The reversal of 222221122213 is 312221122222.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111160227649 + 111060894564 = 333407^2 + 333258^2 .

It is a cyclic number.

It is not a de Polignac number, because 222221122213 - 2²⁵ = 222187567781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222221120213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111110561106 + 111110561107.

It is an arithmetic number, because the mean of its divisors is an integer number (111110561107).

Almost surely, 2^222221122213 is an apocalyptic number.

It is an amenable number.

222221122213 is a deficient number, since it is larger than the sum of its proper divisors (1).

222221122213 is an equidigital number, since it uses as much as digits as its factorization.

222221122213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 22.

Adding to 222221122213 its reverse (312221122222), we get a palindrome (534442244435).

Subtracting 222221122213 from its reverse (312221122222), we obtain a palindrome (90000000009).

The spelling of 222221122213 in words is "two hundred twenty-two billion, two hundred twenty-one million, one hundred twenty-two thousand, two hundred thirteen".