1212066217 has 2 divisors, whose sum is σ = 1212066218. Its totient is φ = 1212066216.

The previous prime is 1212066203. The next prime is 1212066287. The reversal of 1212066217 is 7126602121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 751362921 + 460703296 = 27411^2 + 21464^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212066217 - 2²³ = 1203677609 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212066287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606033108 + 606033109.

It is an arithmetic number, because the mean of its divisors is an integer number (606033109).

Almost surely, 2^1212066217 is an apocalyptic number.

It is an amenable number.

1212066217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212066217 is an equidigital number, since it uses as much as digits as its factorization.

1212066217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 1212066217 is about 34814.7413748831. The cubic root of 1212066217 is about 1066.2084388015.

Adding to 1212066217 its reverse (7126602121), we get a palindrome (8338668338).

The spelling of 1212066217 in words is "one billion, two hundred twelve million, sixty-six thousand, two hundred seventeen".