12109171 has 8 divisors (see below), whose sum is σ = 12387600. Its totient is φ = 11833440.

The previous prime is 12109169. The next prime is 12109177. The reversal of 12109171 is 17190121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12109171 - 2¹ = 12109169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12109177) 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 7 ways as a sum of consecutive naturals, for example, 10365 + ... + 11473.

It is an arithmetic number, because the mean of its divisors is an integer number (1548450).

Almost surely, 2^12109171 is an apocalyptic number.

12109171 is a deficient number, since it is larger than the sum of its proper divisors (278429).

12109171 is a wasteful number, since it uses less digits than its factorization.

12109171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349.

The product of its (nonzero) digits is 126, while the sum is 22.

The square root of 12109171 is about 3479.8234150600. The cubic root of 12109171 is about 229.6350292255.

Adding to 12109171 its reverse (17190121), we get a palindrome (29299292).

The spelling of 12109171 in words is "twelve million, one hundred nine thousand, one hundred seventy-one".