12012012217 has 2 divisors, whose sum is σ = 12012012218. Its totient is φ = 12012012216.

The previous prime is 12012012191. The next prime is 12012012227. The reversal of 12012012217 is 71221021021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7052472441 + 4959539776 = 83979^2 + 70424^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12012012217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12012012194 and 12012012203.

It is not a weakly prime, because it can be changed into another prime (12012012227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006006108 + 6006006109.

It is an arithmetic number, because the mean of its divisors is an integer number (6006006109).

Almost surely, 2^12012012217 is an apocalyptic number.

It is an amenable number.

12012012217 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012012217 is an equidigital number, since it uses as much as digits as its factorization.

12012012217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 19.

Adding to 12012012217 its reverse (71221021021), we get a palindrome (83233033238).

The spelling of 12012012217 in words is "twelve billion, twelve million, twelve thousand, two hundred seventeen".