2122209 has 12 divisors (see below), whose sum is σ = 3148756. Its totient is φ = 1376352.

The previous prime is 2122193. The next prime is 2122213. The reversal of 2122209 is 9022212.

It can be written as a sum of positive squares in 2 ways, for example, as 1830609 + 291600 = 1353^2 + 540^2 .

It is not a de Polignac number, because 2122209 - 2⁴ = 2122193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2122191 and 2122200.

It is not an unprimeable number, because it can be changed into a prime (2122259) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2854 + ... + 3519.

2^2122209 is an apocalyptic number.

It is an amenable number.

2122209 is a deficient number, since it is larger than the sum of its proper divisors (1026547).

2122209 is a wasteful number, since it uses less digits than its factorization.

2122209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6416 (or 6413 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2122209 is about 1456.7803540685. The cubic root of 2122209 is about 128.5077690146.

The spelling of 2122209 in words is "two million, one hundred twenty-two thousand, two hundred nine".