1220421041317 has 2 divisors, whose sum is σ = 1220421041318. Its totient is φ = 1220421041316.

The previous prime is 1220421041311. The next prime is 1220421041381. The reversal of 1220421041317 is 7131401240221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 724803633316 + 495617408001 = 851354^2 + 704001^2 .

It is an emirp because it is prime and its reverse (7131401240221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220421041317 - 2²⁷ = 1220286823589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220421041311) 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, 610210520658 + 610210520659.

It is an arithmetic number, because the mean of its divisors is an integer number (610210520659).

Almost surely, 2^{1220421041317} is an apocalyptic number.

It is an amenable number.

1220421041317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220421041317 is an equidigital number, since it uses as much as digits as its factorization.

1220421041317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 28.

Adding to 1220421041317 its reverse (7131401240221), we get a palindrome (8351822281538).

The spelling of 1220421041317 in words is "one trillion, two hundred twenty billion, four hundred twenty-one million, forty-one thousand, three hundred seventeen".