221000109 has 16 divisors (see below), whose sum is σ = 321777984. Its totient is φ = 133804800.

The previous prime is 221000107. The next prime is 221000137. The reversal of 221000109 is 901000122.

It is a happy number.

221000109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221000109 - 2¹ = 221000107 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221000107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37269 + ... + 42789.

It is an arithmetic number, because the mean of its divisors is an integer number (20111124).

Almost surely, 2^221000109 is an apocalyptic number.

It is an amenable number.

221000109 is a deficient number, since it is larger than the sum of its proper divisors (100777875).

221000109 is a wasteful number, since it uses less digits than its factorization.

221000109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6748.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 221000109 is about 14866.0724133848. The cubic root of 221000109 is about 604.5944589991.

The spelling of 221000109 in words is "two hundred twenty-one million, one hundred nine", and thus it is an aban number.