221104 has 20 divisors (see below), whose sum is σ = 461776. Its totient is φ = 101952.

The previous prime is 221101. The next prime is 221159. The reversal of 221104 is 401122.

It is not an unprimeable number, because it can be changed into a prime (221101) 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, 324 + ... + 739.

2²²¹¹⁰⁴ is an apocalyptic number.

It is an amenable number.

221104 is an abundant number, since it is smaller than the sum of its proper divisors (240672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221104 is a wasteful number, since it uses less digits than its factorization.

221104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084 (or 1078 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 221104 is about 470.2169711952. The cubic root of 221104 is about 60.4689183059.

Adding to 221104 its reverse (401122), we get a palindrome (622226).

It can be divided in two parts, 221 and 104, that added together give a triangular number (325 = T₂₅).

The spelling of 221104 in words is "two hundred twenty-one thousand, one hundred four", and thus it is an iban number.