1220442017 has 2 divisors, whose sum is σ = 1220442018. Its totient is φ = 1220442016.

The previous prime is 1220442011. The next prime is 1220442071. The reversal of 1220442017 is 7102440221.

Together with next prime (1220442071) 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., 1019908096 + 200533921 = 31936^2 + 14161^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220442017 - 2¹² = 1220437921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220441983 and 1220442001.

It is not a weakly prime, because it can be changed into another prime (1220442011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610221008 + 610221009.

It is an arithmetic number, because the mean of its divisors is an integer number (610221009).

Almost surely, 2^1220442017 is an apocalyptic number.

It is an amenable number.

1220442017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220442017 is an equidigital number, since it uses as much as digits as its factorization.

1220442017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 1220442017 is about 34934.8252750747. The cubic root of 1220442017 is about 1068.6587605523.

Adding to 1220442017 its reverse (7102440221), we get a palindrome (8322882238).

The spelling of 1220442017 in words is "one billion, two hundred twenty million, four hundred forty-two thousand, seventeen".