117197221 has 2 divisors, whose sum is σ = 117197222. Its totient is φ = 117197220.

The previous prime is 117197189. The next prime is 117197237. The reversal of 117197221 is 122791711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65788321 + 51408900 = 8111^2 + 7170^2 .

It is a cyclic number.

It is not a de Polignac number, because 117197221 - 2⁵ = 117197189 is a prime.

It is a super-2 number, since 2×117197221² = 27470377220245682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117197261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58598610 + 58598611.

It is an arithmetic number, because the mean of its divisors is an integer number (58598611).

Almost surely, 2^117197221 is an apocalyptic number.

It is an amenable number.

117197221 is a deficient number, since it is larger than the sum of its proper divisors (1).

117197221 is an equidigital number, since it uses as much as digits as its factorization.

117197221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1764, while the sum is 31.

The square root of 117197221 is about 10825.7665317519. The cubic root of 117197221 is about 489.3719859465.

The spelling of 117197221 in words is "one hundred seventeen million, one hundred ninety-seven thousand, two hundred twenty-one".