1113180161 has 2 divisors, whose sum is σ = 1113180162. Its totient is φ = 1113180160.

The previous prime is 1113180157. The next prime is 1113180163. The reversal of 1113180161 is 1610813111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 815445136 + 297735025 = 28556^2 + 17255^2 .

It is a cyclic number.

It is not a de Polignac number, because 1113180161 - 2² = 1113180157 is a prime.

Together with 1113180163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1113180163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556590080 + 556590081.

It is an arithmetic number, because the mean of its divisors is an integer number (556590081).

Almost surely, 2^1113180161 is an apocalyptic number.

It is an amenable number.

1113180161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113180161 is an equidigital number, since it uses as much as digits as its factorization.

1113180161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 23.

The square root of 1113180161 is about 33364.3546468383. The cubic root of 1113180161 is about 1036.3866719119.

Adding to 1113180161 its reverse (1610813111), we get a palindrome (2723993272).

The spelling of 1113180161 in words is "one billion, one hundred thirteen million, one hundred eighty thousand, one hundred sixty-one".