2221109 has 4 divisors (see below), whose sum is σ = 2423040. Its totient is φ = 2019180.

The previous prime is 2221097. The next prime is 2221111. The reversal of 2221109 is 9011222.

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 2221109 - 2²⁰ = 1172533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100949 + ... + 100970.

It is an arithmetic number, because the mean of its divisors is an integer number (605760).

2^2221109 is an apocalyptic number.

It is an amenable number.

2221109 is a deficient number, since it is larger than the sum of its proper divisors (201931).

2221109 is a wasteful number, since it uses less digits than its factorization.

2221109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201930.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 2221109 is about 1490.3385521418. The cubic root of 2221109 is about 130.4737938110.

It can be divided in two parts, 222 and 1109, that added together give a palindrome (1331).

The spelling of 2221109 in words is "two million, two hundred twenty-one thousand, one hundred nine".