118368221 has 2 divisors, whose sum is σ = 118368222. Its totient is φ = 118368220.

The previous prime is 118368197. The next prime is 118368241. The reversal of 118368221 is 122863811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114811225 + 3556996 = 10715^2 + 1886^2 .

It is a cyclic number.

It is not a de Polignac number, because 118368221 - 2²⁶ = 51259357 is a prime.

It is a super-2 number, since 2×118368221² = 28022071485409682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118368241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59184110 + 59184111.

It is an arithmetic number, because the mean of its divisors is an integer number (59184111).

Almost surely, 2^118368221 is an apocalyptic number.

It is an amenable number.

118368221 is a deficient number, since it is larger than the sum of its proper divisors (1).

118368221 is an equidigital number, since it uses as much as digits as its factorization.

118368221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 32.

The square root of 118368221 is about 10879.7160348972. The cubic root of 118368221 is about 490.9964741887.

The spelling of 118368221 in words is "one hundred eighteen million, three hundred sixty-eight thousand, two hundred twenty-one".