12217011 has 4 divisors (see below), whose sum is σ = 16289352. Its totient is φ = 8144672.

The previous prime is 12216991. The next prime is 12217027. The reversal of 12217011 is 11071221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12217011 - 2⁶ = 12216947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12217211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2036166 + ... + 2036171.

It is an arithmetic number, because the mean of its divisors is an integer number (4072338).

Almost surely, 2^12217011 is an apocalyptic number.

12217011 is a deficient number, since it is larger than the sum of its proper divisors (4072341).

12217011 is an equidigital number, since it uses as much as digits as its factorization.

12217011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4072340.

The product of its (nonzero) digits is 28, while the sum is 15.

The square root of 12217011 is about 3495.2841086241. The cubic root of 12217011 is about 230.3146983909.

Adding to 12217011 its reverse (11071221), we get a palindrome (23288232).

The spelling of 12217011 in words is "twelve million, two hundred seventeen thousand, eleven".