111011121995617 has 2 divisors, whose sum is σ = 111011121995618. Its totient is φ = 111011121995616.

The previous prime is 111011121995573. The next prime is 111011121995621. The reversal of 111011121995617 is 716599121110111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102440491021521 + 8570630974096 = 10121289^2 + 2927564^2 .

It is an emirp because it is prime and its reverse (716599121110111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111011121995617 is a prime.

It is not a weakly prime, because it can be changed into another prime (111011121995317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55505560997808 + 55505560997809.

It is an arithmetic number, because the mean of its divisors is an integer number (55505560997809).

Almost surely, 2^{111011121995617} is an apocalyptic number.

It is an amenable number.

111011121995617 is a deficient number, since it is larger than the sum of its proper divisors (1).

111011121995617 is an equidigital number, since it uses as much as digits as its factorization.

111011121995617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 46.

The spelling of 111011121995617 in words is "one hundred eleven trillion, eleven billion, one hundred twenty-one million, nine hundred ninety-five thousand, six hundred seventeen".