221108 has 12 divisors (see below), whose sum is σ = 390432. Its totient is φ = 109560.

The previous prime is 221101. The next prime is 221159. The reversal of 221108 is 801122.

It is a junction number, because it is equal to n+sod(n) for n = 221092 and 221101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221101) by changing a digit.

221108 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503 + ... + 833.

It is an arithmetic number, because the mean of its divisors is an integer number (32536).

2²²¹¹⁰⁸ is an apocalyptic number.

It is an amenable number.

221108 is a deficient number, since it is larger than the sum of its proper divisors (169324).

221108 is a wasteful number, since it uses less digits than its factorization.

221108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502 (or 500 counting only the distinct ones).

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

The square root of 221108 is about 470.2212245316. The cubic root of 221108 is about 60.4692829522.

Adding to 221108 its sum of digits (14), we get a palindrome (221122).

The spelling of 221108 in words is "two hundred twenty-one thousand, one hundred eight".