1212211200217 has 2 divisors, whose sum is σ = 1212211200218. Its totient is φ = 1212211200216.

The previous prime is 1212211200133. The next prime is 1212211200271. The reversal of 1212211200217 is 7120021122121.

Together with next prime (1212211200271) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1181255964736 + 30955235481 = 1086856^2 + 175941^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212211200217 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212211200017) 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, 606105600108 + 606105600109.

It is an arithmetic number, because the mean of its divisors is an integer number (606105600109).

Almost surely, 2^{1212211200217} is an apocalyptic number.

It is an amenable number.

1212211200217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212211200217 is an equidigital number, since it uses as much as digits as its factorization.

1212211200217 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 1212211200217 its reverse (7120021122121), we get a palindrome (8332232322338).

The spelling of 1212211200217 in words is "one trillion, two hundred twelve billion, two hundred eleven million, two hundred thousand, two hundred seventeen".