12122161 has 8 divisors (see below), whose sum is σ = 12362144. Its totient is φ = 11884320.

The previous prime is 12122153. The next prime is 12122167. The reversal of 12122161 is 16122121.

12122161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12122161 - 2³ = 12122153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12122167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15010 + ... + 15796.

It is an arithmetic number, because the mean of its divisors is an integer number (1545268).

Almost surely, 2^12122161 is an apocalyptic number.

It is an amenable number.

12122161 is a deficient number, since it is larger than the sum of its proper divisors (239983).

12122161 is an equidigital number, since it uses as much as digits as its factorization.

12122161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071.

The product of its digits is 48, while the sum is 16.

The square root of 12122161 is about 3481.6893887881. The cubic root of 12122161 is about 229.7171128247.

Adding to 12122161 its reverse (16122121), we get a palindrome (28244282).

The spelling of 12122161 in words is "twelve million, one hundred twenty-two thousand, one hundred sixty-one".