1212200220017 has 2 divisors, whose sum is σ = 1212200220018. Its totient is φ = 1212200220016.

The previous prime is 1212200219987. The next prime is 1212200220029. The reversal of 1212200220017 is 7100220022121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1126790742016 + 85409478001 = 1061504^2 + 292249^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212200220017 - 2⁶ = 1212200219953 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212200220047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606100110008 + 606100110009.

It is an arithmetic number, because the mean of its divisors is an integer number (606100110009).

Almost surely, 2^{1212200220017} is an apocalyptic number.

It is an amenable number.

1212200220017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212200220017 is an equidigital number, since it uses as much as digits as its factorization.

1212200220017 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 1212200220017 its reverse (7100220022121), we get a palindrome (8312420242138).

The spelling of 1212200220017 in words is "one trillion, two hundred twelve billion, two hundred million, two hundred twenty thousand, seventeen".