108221 has 4 divisors (see below), whose sum is σ = 111744. Its totient is φ = 104700.

The previous prime is 108217. The next prime is 108223. The reversal of 108221 is 122801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 108221 - 2² = 108217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 108196 and 108205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108223) 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 3 ways as a sum of consecutive naturals, for example, 1715 + ... + 1776.

It is an arithmetic number, because the mean of its divisors is an integer number (27936).

2¹⁰⁸²²¹ is an apocalyptic number.

It is an amenable number.

108221 is a deficient number, since it is larger than the sum of its proper divisors (3523).

108221 is an equidigital number, since it uses as much as digits as its factorization.

108221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3522.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 108221 is about 328.9696034590. The cubic root of 108221 is about 47.6544923566.

It can be divided in two parts, 1082 and 21, that multiplied together give a palindrome (22722).

The spelling of 108221 in words is "one hundred eight thousand, two hundred twenty-one".