1161216171 has 12 divisors (see below), whose sum is σ = 1679165280. Its totient is φ = 773288880.

The previous prime is 1161216113. The next prime is 1161216211. The reversal of 1161216171 is 1716121611.

It is not a de Polignac number, because 1161216171 - 2⁶ = 1161216107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1161216101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62616 + ... + 79013.

It is an arithmetic number, because the mean of its divisors is an integer number (139930440).

Almost surely, 2^1161216171 is an apocalyptic number.

1161216171 is a deficient number, since it is larger than the sum of its proper divisors (517949109).

1161216171 is a wasteful number, since it uses less digits than its factorization.

1161216171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142546 (or 142543 counting only the distinct ones).

The product of its digits is 504, while the sum is 27.

The square root of 1161216171 is about 34076.6220597054. The cubic root of 1161216171 is about 1051.0846451671.

Adding to 1161216171 its reverse (1716121611), we get a palindrome (2877337782).

The spelling of 1161216171 in words is "one billion, one hundred sixty-one million, two hundred sixteen thousand, one hundred seventy-one".