12120210217 has 2 divisors, whose sum is σ = 12120210218. Its totient is φ = 12120210216.

The previous prime is 12120210209. The next prime is 12120210241. The reversal of 12120210217 is 71201202121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8134055721 + 3986154496 = 90189^2 + 63136^2 .

It is a cyclic number.

It is not a de Polignac number, because 12120210217 - 2³ = 12120210209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12120210194 and 12120210203.

It is not a weakly prime, because it can be changed into another prime (12120210917) 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, 6060105108 + 6060105109.

It is an arithmetic number, because the mean of its divisors is an integer number (6060105109).

Almost surely, 2^12120210217 is an apocalyptic number.

It is an amenable number.

12120210217 is a deficient number, since it is larger than the sum of its proper divisors (1).

12120210217 is an equidigital number, since it uses as much as digits as its factorization.

12120210217 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 12120210217 its reverse (71201202121), we get a palindrome (83321412338).

The spelling of 12120210217 in words is "twelve billion, one hundred twenty million, two hundred ten thousand, two hundred seventeen".