1220001222017 has 2 divisors, whose sum is σ = 1220001222018. Its totient is φ = 1220001222016.

The previous prime is 1220001221981. The next prime is 1220001222071. The reversal of 1220001222017 is 7102221000221.

Together with next prime (1220001222071) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1183659137521 + 36342084496 = 1087961^2 + 190636^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220001222017 - 2¹⁸ = 1220000959873 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1220001222017.

It is not a weakly prime, because it can be changed into another prime (1220001225017) 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, 610000611008 + 610000611009.

It is an arithmetic number, because the mean of its divisors is an integer number (610000611009).

Almost surely, 2^{1220001222017} is an apocalyptic number.

It is an amenable number.

1220001222017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220001222017 is an equidigital number, since it uses as much as digits as its factorization.

1220001222017 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 20.

Adding to 1220001222017 its reverse (7102221000221), we get a palindrome (8322222222238).

The spelling of 1220001222017 in words is "one trillion, two hundred twenty billion, one million, two hundred twenty-two thousand, seventeen".