111011020110161 has 2 divisors, whose sum is σ = 111011020110162. Its totient is φ = 111011020110160.

The previous prime is 111011020110073. The next prime is 111011020110173. The reversal of 111011020110161 is 161011020110111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85635016858561 + 25376003251600 = 9253919^2 + 5037460^2 .

It is a cyclic number.

It is not a de Polignac number, because 111011020110161 - 2³⁸ = 110736142203217 is a prime.

It is not a weakly prime, because it can be changed into another prime (111011020110191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55505510055080 + 55505510055081.

It is an arithmetic number, because the mean of its divisors is an integer number (55505510055081).

Almost surely, 2^{111011020110161} is an apocalyptic number.

It is an amenable number.

111011020110161 is a deficient number, since it is larger than the sum of its proper divisors (1).

111011020110161 is an equidigital number, since it uses as much as digits as its factorization.

111011020110161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 17.

Adding to 111011020110161 its reverse (161011020110111), we get a palindrome (272022040220272).

The spelling of 111011020110161 in words is "one hundred eleven trillion, eleven billion, twenty million, one hundred ten thousand, one hundred sixty-one".