118265221 has 2 divisors, whose sum is σ = 118265222. Its totient is φ = 118265220.

The previous prime is 118265201. The next prime is 118265233. The reversal of 118265221 is 122562811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110481121 + 7784100 = 10511^2 + 2790^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118265221 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 118265221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118265201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59132610 + 59132611.

It is an arithmetic number, because the mean of its divisors is an integer number (59132611).

Almost surely, 2^118265221 is an apocalyptic number.

It is an amenable number.

118265221 is a deficient number, since it is larger than the sum of its proper divisors (1).

118265221 is an equidigital number, since it uses as much as digits as its factorization.

118265221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 28.

The square root of 118265221 is about 10874.9814252715. The cubic root of 118265221 is about 490.8540167161.

The spelling of 118265221 in words is "one hundred eighteen million, two hundred sixty-five thousand, two hundred twenty-one".