12421112017 has 2 divisors, whose sum is σ = 12421112018. Its totient is φ = 12421112016.

The previous prime is 12421111979. The next prime is 12421112021. The reversal of 12421112017 is 71021112421.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8979647121 + 3441464896 = 94761^2 + 58664^2 .

It is a cyclic number.

It is not a de Polignac number, because 12421112017 - 2¹¹ = 12421109969 is a prime.

It is not a weakly prime, because it can be changed into another prime (12421112317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6210556008 + 6210556009.

It is an arithmetic number, because the mean of its divisors is an integer number (6210556009).

Almost surely, 2^12421112017 is an apocalyptic number.

It is an amenable number.

12421112017 is a deficient number, since it is larger than the sum of its proper divisors (1).

12421112017 is an equidigital number, since it uses as much as digits as its factorization.

12421112017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 22.

Adding to 12421112017 its reverse (71021112421), we get a palindrome (83442224438).

The spelling of 12421112017 in words is "twelve billion, four hundred twenty-one million, one hundred twelve thousand, seventeen".