12209105 has 16 divisors (see below), whose sum is σ = 14985984. Its totient is φ = 9547200.

The previous prime is 12209101. The next prime is 12209137. The reversal of 12209105 is 50190221.

It is not a de Polignac number, because 12209105 - 2² = 12209101 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12209101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77687 + ... + 77843.

It is an arithmetic number, because the mean of its divisors is an integer number (936624).

Almost surely, 2^12209105 is an apocalyptic number.

It is an amenable number.

12209105 is a deficient number, since it is larger than the sum of its proper divisors (2776879).

12209105 is a wasteful number, since it uses less digits than its factorization.

12209105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 12209105 is about 3494.1529731825. The cubic root of 12209105 is about 230.2650064510.

Adding to 12209105 its reverse (50190221), we get a palindrome (62399326).

The spelling of 12209105 in words is "twelve million, two hundred nine thousand, one hundred five".