22221222217 has 2 divisors, whose sum is σ = 22221222218. Its totient is φ = 22221222216.

The previous prime is 22221222203. The next prime is 22221222253. The reversal of 22221222217 is 71222212222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21696995401 + 524226816 = 147299^2 + 22896^2 .

It is a cyclic number.

It is not a de Polignac number, because 22221222217 - 2¹⁵ = 22221189449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22221222191 and 22221222200.

It is not a weakly prime, because it can be changed into another prime (22221222017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110611108 + 11110611109.

It is an arithmetic number, because the mean of its divisors is an integer number (11110611109).

Almost surely, 2^22221222217 is an apocalyptic number.

It is an amenable number.

22221222217 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221222217 is an equidigital number, since it uses as much as digits as its factorization.

22221222217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1792, while the sum is 25.

Adding to 22221222217 its reverse (71222212222), we get a palindrome (93443434439).

The spelling of 22221222217 in words is "twenty-two billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred seventeen".