1220211017 has 2 divisors, whose sum is σ = 1220211018. Its totient is φ = 1220211016.

The previous prime is 1220211007. The next prime is 1220211053. The reversal of 1220211017 is 7101120221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 973689616 + 246521401 = 31204^2 + 15701^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220211017 - 2⁴ = 1220211001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220210986 and 1220211004.

It is not a weakly prime, because it can be changed into another prime (1220211007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610105508 + 610105509.

It is an arithmetic number, because the mean of its divisors is an integer number (610105509).

Almost surely, 2^1220211017 is an apocalyptic number.

It is an amenable number.

1220211017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220211017 is an equidigital number, since it uses as much as digits as its factorization.

1220211017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 1220211017 is about 34931.5189621064. The cubic root of 1220211017 is about 1068.5913325913.

Adding to 1220211017 its reverse (7101120221), we get a palindrome (8321331238).

The spelling of 1220211017 in words is "one billion, two hundred twenty million, two hundred eleven thousand, seventeen".