12132161 has 4 divisors (see below), whose sum is σ = 12167472. Its totient is φ = 12096852.

The previous prime is 12132151. The next prime is 12132217. The reversal of 12132161 is 16123121.

12132161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16123121 = 7 ⋅2303303.

It is a cyclic number.

It is not a de Polignac number, because 12132161 - 2⁶ = 12132097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12132151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17135 + ... + 17828.

It is an arithmetic number, because the mean of its divisors is an integer number (3041868).

Almost surely, 2^12132161 is an apocalyptic number.

It is an amenable number.

12132161 is a deficient number, since it is larger than the sum of its proper divisors (35311).

12132161 is an equidigital number, since it uses as much as digits as its factorization.

12132161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35310.

The product of its digits is 72, while the sum is 17.

The square root of 12132161 is about 3483.1251771936. The cubic root of 12132161 is about 229.7802627242.

Adding to 12132161 its reverse (16123121), we get a palindrome (28255282).

The spelling of 12132161 in words is "twelve million, one hundred thirty-two thousand, one hundred sixty-one".