111020202120917 has 2 divisors, whose sum is σ = 111020202120918. Its totient is φ = 111020202120916.

The previous prime is 111020202120899. The next prime is 111020202121013. The reversal of 111020202120917 is 719021202020111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95725266677041 + 15294935443876 = 9783929^2 + 3910874^2 .

It is a cyclic number.

It is not a de Polignac number, because 111020202120917 - 2¹⁸ = 111020201858773 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111020202120917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111020202140917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510101060458 + 55510101060459.

It is an arithmetic number, because the mean of its divisors is an integer number (55510101060459).

Almost surely, 2^{111020202120917} is an apocalyptic number.

It is an amenable number.

111020202120917 is a deficient number, since it is larger than the sum of its proper divisors (1).

111020202120917 is an equidigital number, since it uses as much as digits as its factorization.

111020202120917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 29.

The spelling of 111020202120917 in words is "one hundred eleven trillion, twenty billion, two hundred two million, one hundred twenty thousand, nine hundred seventeen".