111017161 has 2 divisors, whose sum is σ = 111017162. Its totient is φ = 111017160.

The previous prime is 111017147. The next prime is 111017167. The reversal of 111017161 is 161710111.

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., 96432400 + 14584761 = 9820^2 + 3819^2 .

It is a cyclic number.

It is not a de Polignac number, because 111017161 - 2¹⁷ = 110886089 is a prime.

It is not a weakly prime, because it can be changed into another prime (111017167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55508580 + 55508581.

It is an arithmetic number, because the mean of its divisors is an integer number (55508581).

Almost surely, 2^111017161 is an apocalyptic number.

It is an amenable number.

111017161 is a deficient number, since it is larger than the sum of its proper divisors (1).

111017161 is an equidigital number, since it uses as much as digits as its factorization.

111017161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42, while the sum is 19.

The square root of 111017161 is about 10536.4681463952. The cubic root of 111017161 is about 480.6143190532.

Adding to 111017161 its reverse (161710111), we get a palindrome (272727272).

The spelling of 111017161 in words is "one hundred eleven million, seventeen thousand, one hundred sixty-one".