1217119420841 has 2 divisors, whose sum is σ = 1217119420842. Its totient is φ = 1217119420840.

The previous prime is 1217119420817. The next prime is 1217119420919. The reversal of 1217119420841 is 1480249117121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 867124128025 + 349995292816 = 931195^2 + 591604^2 .

It is an emirp because it is prime and its reverse (1480249117121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1217119420841 - 2³⁸ = 942241513897 is a prime.

It is not a weakly prime, because it can be changed into another prime (1217119423841) 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, 608559710420 + 608559710421.

It is an arithmetic number, because the mean of its divisors is an integer number (608559710421).

Almost surely, 2^{1217119420841} is an apocalyptic number.

It is an amenable number.

1217119420841 is a deficient number, since it is larger than the sum of its proper divisors (1).

1217119420841 is an equidigital number, since it uses as much as digits as its factorization.

1217119420841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 41.

The spelling of 1217119420841 in words is "one trillion, two hundred seventeen billion, one hundred nineteen million, four hundred twenty thousand, eight hundred forty-one".