118454221 has 2 divisors, whose sum is σ = 118454222. Its totient is φ = 118454220.

The previous prime is 118454201. The next prime is 118454239. The reversal of 118454221 is 122454811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106378596 + 12075625 = 10314^2 + 3475^2 .

It is an emirp because it is prime and its reverse (122454811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 118454221 - 2⁷ = 118454093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 118454221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118454201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59227110 + 59227111.

It is an arithmetic number, because the mean of its divisors is an integer number (59227111).

Almost surely, 2^118454221 is an apocalyptic number.

It is an amenable number.

118454221 is a deficient number, since it is larger than the sum of its proper divisors (1).

118454221 is an equidigital number, since it uses as much as digits as its factorization.

118454221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2560, while the sum is 28.

The square root of 118454221 is about 10883.6676263105. The cubic root of 118454221 is about 491.1153559692.

The spelling of 118454221 in words is "one hundred eighteen million, four hundred fifty-four thousand, two hundred twenty-one".