22211222212217 has 2 divisors, whose sum is σ = 22211222212218. Its totient is φ = 22211222212216.

The previous prime is 22211222212189. The next prime is 22211222212243. The reversal of 22211222212217 is 71221222211222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21198188014201 + 1013034198016 = 4604149^2 + 1006496^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22211222212217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22211222212217.

It is not a weakly prime, because it can be changed into another prime (22211222212247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11105611106108 + 11105611106109.

It is an arithmetic number, because the mean of its divisors is an integer number (11105611106109).

Almost surely, 2^{22211222212217} is an apocalyptic number.

It is an amenable number.

22211222212217 is a deficient number, since it is larger than the sum of its proper divisors (1).

22211222212217 is an equidigital number, since it uses as much as digits as its factorization.

22211222212217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3584, while the sum is 29.

Adding to 22211222212217 its reverse (71221222211222), we get a palindrome (93432444423439).

The spelling of 22211222212217 in words is "twenty-two trillion, two hundred eleven billion, two hundred twenty-two million, two hundred twelve thousand, two hundred seventeen".