111000121011161 has 2 divisors, whose sum is σ = 111000121011162. Its totient is φ = 111000121011160.

The previous prime is 111000121011089. The next prime is 111000121011167. The reversal of 111000121011161 is 161110121000111.

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., 110981168257600 + 18952753561 = 10534760^2 + 137669^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111000121011161 is a prime.

It is not a weakly prime, because it can be changed into another prime (111000121011167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55500060505580 + 55500060505581.

It is an arithmetic number, because the mean of its divisors is an integer number (55500060505581).

Almost surely, 2^{111000121011161} is an apocalyptic number.

It is an amenable number.

111000121011161 is a deficient number, since it is larger than the sum of its proper divisors (1).

111000121011161 is an equidigital number, since it uses as much as digits as its factorization.

111000121011161 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 111000121011161 its reverse (161110121000111), we get a palindrome (272110242011272).

The spelling of 111000121011161 in words is "one hundred eleven trillion, one hundred twenty-one million, eleven thousand, one hundred sixty-one".