2212109 has 4 divisors (see below), whose sum is σ = 2215104. Its totient is φ = 2209116.

The previous prime is 2212099. The next prime is 2212123. The reversal of 2212109 is 9012122.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2212109 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 (2212169) 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, 494 + ... + 2160.

It is an arithmetic number, because the mean of its divisors is an integer number (553776).

2^2212109 is an apocalyptic number.

It is an amenable number.

2212109 is a deficient number, since it is larger than the sum of its proper divisors (2995).

2212109 is a wasteful number, since it uses less digits than its factorization.

2212109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2994.

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

The square root of 2212109 is about 1487.3160390448. The cubic root of 2212109 is about 130.2973273438.

The spelling of 2212109 in words is "two million, two hundred twelve thousand, one hundred nine".