118745221 has 16 divisors (see below), whose sum is σ = 148331520. Its totient is φ = 92701440.

The previous prime is 118745219. The next prime is 118745233. The reversal of 118745221 is 122547811.

It is a cyclic number.

It is not a de Polignac number, because 118745221 - 2¹ = 118745219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118745201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12406 + ... + 19783.

It is an arithmetic number, because the mean of its divisors is an integer number (9270720).

Almost surely, 2^118745221 is an apocalyptic number.

It is an amenable number.

118745221 is a deficient number, since it is larger than the sum of its proper divisors (29586299).

118745221 is a wasteful number, since it uses less digits than its factorization.

118745221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32244.

The product of its digits is 4480, while the sum is 31.

The square root of 118745221 is about 10897.0280810871. The cubic root of 118745221 is about 491.5171924951.

The spelling of 118745221 in words is "one hundred eighteen million, seven hundred forty-five thousand, two hundred twenty-one".