222220111221217 has 2 divisors, whose sum is σ = 222220111221218. Its totient is φ = 222220111221216.

The previous prime is 222220111221191. The next prime is 222220111221221. The reversal of 222220111221217 is 712122111022222.

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., 143940510145441 + 78279601075776 = 11997521^2 + 8847576^2 .

It is a cyclic number.

It is not a de Polignac number, because 222220111221217 - 2⁷ = 222220111221089 is a prime.

It is a super-2 number, since 2×222220111221217² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (222220111221247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111110055610608 + 111110055610609.

It is an arithmetic number, because the mean of its divisors is an integer number (111110055610609).

Almost surely, 2^{222220111221217} is an apocalyptic number.

It is an amenable number.

222220111221217 is a deficient number, since it is larger than the sum of its proper divisors (1).

222220111221217 is an equidigital number, since it uses as much as digits as its factorization.

222220111221217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 28.

Adding to 222220111221217 its reverse (712122111022222), we get a palindrome (934342222243439).

The spelling of 222220111221217 in words is "two hundred twenty-two trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty-one thousand, two hundred seventeen".