107217221 has 2 divisors, whose sum is σ = 107217222. Its totient is φ = 107217220.

The previous prime is 107217179. The next prime is 107217259. The reversal of 107217221 is 122712701.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97792321 + 9424900 = 9889^2 + 3070^2 .

It is an emirp because it is prime and its reverse (122712701) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-107217221 is a prime.

It is a super-2 number, since 2×107217221² = 22991064957925682, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (107217821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53608610 + 53608611.

It is an arithmetic number, because the mean of its divisors is an integer number (53608611).

Almost surely, 2^107217221 is an apocalyptic number.

It is an amenable number.

107217221 is a deficient number, since it is larger than the sum of its proper divisors (1).

107217221 is an equidigital number, since it uses as much as digits as its factorization.

107217221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 392, while the sum is 23.

The square root of 107217221 is about 10354.5748826304. The cubic root of 107217221 is about 475.0669837207.

Adding to 107217221 its reverse (122712701), we get a palindrome (229929922).

The spelling of 107217221 in words is "one hundred seven million, two hundred seventeen thousand, two hundred twenty-one".