117356221 has 2 divisors, whose sum is σ = 117356222. Its totient is φ = 117356220.

The previous prime is 117356207. The next prime is 117356231. The reversal of 117356221 is 122653711.

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., 107931321 + 9424900 = 10389^2 + 3070^2 .

It is an emirp because it is prime and its reverse (122653711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117356221 - 2¹¹ = 117354173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 117356221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117356231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58678110 + 58678111.

It is an arithmetic number, because the mean of its divisors is an integer number (58678111).

Almost surely, 2^117356221 is an apocalyptic number.

It is an amenable number.

117356221 is a deficient number, since it is larger than the sum of its proper divisors (1).

117356221 is an equidigital number, since it uses as much as digits as its factorization.

117356221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 28.

The square root of 117356221 is about 10833.1076335463. The cubic root of 117356221 is about 489.5931942186.

It can be divided in two parts, 11735 and 6221, that added together give a square (17956 = 134²).

The spelling of 117356221 in words is "one hundred seventeen million, three hundred fifty-six thousand, two hundred twenty-one".