111302161 has 4 divisors (see below), whose sum is σ = 111550500. Its totient is φ = 111053824.

The previous prime is 111302159. The next prime is 111302197. The reversal of 111302161 is 161203111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51394561 + 59907600 = 7169^2 + 7740^2 .

It is a cyclic number.

It is not a de Polignac number, because 111302161 - 2¹ = 111302159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111302461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123496 + ... + 124393.

It is an arithmetic number, because the mean of its divisors is an integer number (27887625).

Almost surely, 2^111302161 is an apocalyptic number.

It is an amenable number.

111302161 is a deficient number, since it is larger than the sum of its proper divisors (248339).

111302161 is an equidigital number, since it uses as much as digits as its factorization.

111302161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248338.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 111302161 is about 10549.9839336371. The cubic root of 111302161 is about 481.0252406134.

Adding to 111302161 its reverse (161203111), we get a palindrome (272505272).

The spelling of 111302161 in words is "one hundred eleven million, three hundred two thousand, one hundred sixty-one".