111066161 has 2 divisors, whose sum is σ = 111066162. Its totient is φ = 111066160.

The previous prime is 111066157. The next prime is 111066169. The reversal of 111066161 is 161660111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105185536 + 5880625 = 10256^2 + 2425^2 .

It is an emirp because it is prime and its reverse (161660111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111066161 - 2² = 111066157 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111066169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55533080 + 55533081.

It is an arithmetic number, because the mean of its divisors is an integer number (55533081).

Almost surely, 2^111066161 is an apocalyptic number.

It is an amenable number.

111066161 is a deficient number, since it is larger than the sum of its proper divisors (1).

111066161 is an equidigital number, since it uses as much as digits as its factorization.

111066161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 111066161 is about 10538.7931472252. The cubic root of 111066161 is about 480.6850187465.

The spelling of 111066161 in words is "one hundred eleven million, sixty-six thousand, one hundred sixty-one".