222112217 has 2 divisors, whose sum is σ = 222112218. Its totient is φ = 222112216.

The previous prime is 222112201. The next prime is 222112273. The reversal of 222112217 is 712211222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147962896 + 74149321 = 12164^2 + 8611^2 .

It is a cyclic number.

It is not a de Polignac number, because 222112217 - 2⁴ = 222112201 is a prime.

It is equal to p_12232451 and since 222112217 and 12232451 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (222612217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111056108 + 111056109.

It is an arithmetic number, because the mean of its divisors is an integer number (111056109).

Almost surely, 2^222112217 is an apocalyptic number.

It is an amenable number.

222112217 is a deficient number, since it is larger than the sum of its proper divisors (1).

222112217 is an equidigital number, since it uses as much as digits as its factorization.

222112217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 224, while the sum is 20.

The square root of 222112217 is about 14903.4297059435. The cubic root of 222112217 is about 605.6069014036.

Adding to 222112217 its reverse (712211222), we get a palindrome (934323439).

The spelling of 222112217 in words is "two hundred twenty-two million, one hundred twelve thousand, two hundred seventeen".