12217135 has 16 divisors (see below), whose sum is σ = 17741376. Its totient is φ = 7884288.

The previous prime is 12217109. The next prime is 12217147. The reversal of 12217135 is 53171221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12217135 - 2¹¹ = 12215087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9672 + ... + 10861.

It is an arithmetic number, because the mean of its divisors is an integer number (1108836).

Almost surely, 2^12217135 is an apocalyptic number.

12217135 is a deficient number, since it is larger than the sum of its proper divisors (5524241).

12217135 is a wasteful number, since it uses less digits than its factorization.

12217135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20562.

The product of its digits is 420, while the sum is 22.

The square root of 12217135 is about 3495.3018467652. The cubic root of 12217135 is about 230.3154776029.

Adding to 12217135 its reverse (53171221), we get a palindrome (65388356).

The spelling of 12217135 in words is "twelve million, two hundred seventeen thousand, one hundred thirty-five".