12012217 has 8 divisors (see below), whose sum is σ = 14535936. Its totient is φ = 9690432.

The previous prime is 12012197. The next prime is 12012257. The reversal of 12012217 is 71221021.

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 12012217 - 2⁷ = 12012089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12012217.

It is not an unprimeable number, because it can be changed into a prime (12012257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50353 + ... + 50590.

It is an arithmetic number, because the mean of its divisors is an integer number (1816992).

Almost surely, 2^12012217 is an apocalyptic number.

12012217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12012217 is a deficient number, since it is larger than the sum of its proper divisors (2523719).

12012217 is a wasteful number, since it uses less digits than its factorization.

12012217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100967.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 12012217 is about 3465.8645386108. The cubic root of 12012217 is about 229.0205164586.

Adding to 12012217 its reverse (71221021), we get a palindrome (83233238).

The spelling of 12012217 in words is "twelve million, twelve thousand, two hundred seventeen".