118221 has 8 divisors (see below), whose sum is σ = 159264. Its totient is φ = 78000.

The previous prime is 118219. The next prime is 118247. The reversal of 118221 is 122811.

118221 is nontrivially palindromic in base 4.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 118221 - 2¹ = 118219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 118221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346 + ... + 596.

It is an arithmetic number, because the mean of its divisors is an integer number (19908).

2¹¹⁸²²¹ is an apocalyptic number.

It is an amenable number.

118221 is a deficient number, since it is larger than the sum of its proper divisors (41043).

118221 is a wasteful number, since it uses less digits than its factorization.

118221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411.

The product of its digits is 32, while the sum is 15.

The square root of 118221 is about 343.8328082077. The cubic root of 118221 is about 49.0792830057.

The spelling of 118221 in words is "one hundred eighteen thousand, two hundred twenty-one".