12017231 has 2 divisors, whose sum is σ = 12017232. Its totient is φ = 12017230.

The previous prime is 12017227. The next prime is 12017237. The reversal of 12017231 is 13271021.

It is a weak prime.

It is an emirp because it is prime and its reverse (13271021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12017231 - 2² = 12017227 is a prime.

It is a super-2 number, since 2×12017231² = 288827681814722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12017237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6008615 + 6008616.

It is an arithmetic number, because the mean of its divisors is an integer number (6008616).

Almost surely, 2^12017231 is an apocalyptic number.

12017231 is a deficient number, since it is larger than the sum of its proper divisors (1).

12017231 is an equidigital number, since it uses as much as digits as its factorization.

12017231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 12017231 is about 3466.5878035902. The cubic root of 12017231 is about 229.0523770534.

Adding to 12017231 its reverse (13271021), we get a palindrome (25288252).

The spelling of 12017231 in words is "twelve million, seventeen thousand, two hundred thirty-one".