1131132161 has 2 divisors, whose sum is σ = 1131132162. Its totient is φ = 1131132160.

The previous prime is 1131132139. The next prime is 1131132181. The reversal of 1131132161 is 1612311311.

It is an a-pointer prime, because the next prime (1131132181) can be obtained adding 1131132161 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1110155761 + 20976400 = 33319^2 + 4580^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131132161 - 2¹⁰ = 1131131137 is a prime.

It is not a weakly prime, because it can be changed into another prime (1131132181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565566080 + 565566081.

It is an arithmetic number, because the mean of its divisors is an integer number (565566081).

Almost surely, 2^1131132161 is an apocalyptic number.

It is an amenable number.

1131132161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131132161 is an equidigital number, since it uses as much as digits as its factorization.

1131132161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108, while the sum is 20.

The square root of 1131132161 is about 33632.3082912844. The cubic root of 1131132161 is about 1041.9281786452.

Adding to 1131132161 its reverse (1612311311), we get a palindrome (2743443472).

The spelling of 1131132161 in words is "one billion, one hundred thirty-one million, one hundred thirty-two thousand, one hundred sixty-one".