118275221 has 2 divisors, whose sum is σ = 118275222. Its totient is φ = 118275220.

The previous prime is 118275203. The next prime is 118275259. The reversal of 118275221 is 122572811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108972721 + 9302500 = 10439^2 + 3050^2 .

It is an emirp because it is prime and its reverse (122572811) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118275221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118275281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59137610 + 59137611.

It is an arithmetic number, because the mean of its divisors is an integer number (59137611).

Almost surely, 2^118275221 is an apocalyptic number.

It is an amenable number.

118275221 is a deficient number, since it is larger than the sum of its proper divisors (1).

118275221 is an equidigital number, since it uses as much as digits as its factorization.

118275221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2240, while the sum is 29.

The square root of 118275221 is about 10875.4411864531. The cubic root of 118275221 is about 490.8678511632.

The spelling of 118275221 in words is "one hundred eighteen million, two hundred seventy-five thousand, two hundred twenty-one".