111101161 has 2 divisors, whose sum is σ = 111101162. Its totient is φ = 111101160.

The previous prime is 111101153. The next prime is 111101167. The reversal of 111101161 is 161101111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95648400 + 15452761 = 9780^2 + 3931^2 .

It is an emirp because it is prime and its reverse (161101111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111101161 - 2³ = 111101153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111101167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55550580 + 55550581.

It is an arithmetic number, because the mean of its divisors is an integer number (55550581).

Almost surely, 2^111101161 is an apocalyptic number.

It is an amenable number.

111101161 is a deficient number, since it is larger than the sum of its proper divisors (1).

111101161 is an equidigital number, since it uses as much as digits as its factorization.

111101161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6, while the sum is 13.

The square root of 111101161 is about 10540.4535481164. The cubic root of 111101161 is about 480.7355057973.

Adding to 111101161 its reverse (161101111), we get a palindrome (272202272).

The spelling of 111101161 in words is "one hundred eleven million, one hundred one thousand, one hundred sixty-one".