22122212213 has 2 divisors, whose sum is σ = 22122212214. Its totient is φ = 22122212212.

The previous prime is 22122212201. The next prime is 22122212311. The reversal of 22122212213 is 31221222122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14811620209 + 7310592004 = 121703^2 + 85502^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22122212213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22122212113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11061106106 + 11061106107.

It is an arithmetic number, because the mean of its divisors is an integer number (11061106107).

Almost surely, 2^22122212213 is an apocalyptic number.

It is an amenable number.

22122212213 is a deficient number, since it is larger than the sum of its proper divisors (1).

22122212213 is an equidigital number, since it uses as much as digits as its factorization.

22122212213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 20.

Adding to 22122212213 its reverse (31221222122), we get a palindrome (53343434335).

Subtracting 22122212213 from its reverse (31221222122), we obtain a palindrome (9099009909).

The spelling of 22122212213 in words is "twenty-two billion, one hundred twenty-two million, two hundred twelve thousand, two hundred thirteen".