12217107 has 8 divisors (see below), whose sum is σ = 18616576. Its totient is φ = 6981192.

The previous prime is 12217099. The next prime is 12217109. The reversal of 12217107 is 70171221.

It is a happy number.

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

It is not a de Polignac number, because 12217107 - 2³ = 12217099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 581767 = 12217107 / (1 + 2 + 2 + 1 + 7 + 1 + 0 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12217109) 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, 290863 + ... + 290904.

It is an arithmetic number, because the mean of its divisors is an integer number (2327072).

Almost surely, 2^12217107 is an apocalyptic number.

12217107 is a deficient number, since it is larger than the sum of its proper divisors (6399469).

12217107 is an equidigital number, since it uses as much as digits as its factorization.

12217107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581777.

The product of its (nonzero) digits is 196, while the sum is 21.

The square root of 12217107 is about 3495.2978413863. The cubic root of 12217107 is about 230.3153016523.

Adding to 12217107 its reverse (70171221), we get a palindrome (82388328).

The spelling of 12217107 in words is "twelve million, two hundred seventeen thousand, one hundred seven".