12327121 has 3 divisors (see below), whose sum is σ = 12330633.
Its totient is φ = 12323610.
The previous prime is 12327109. The next prime is 12327127. The reversal of 12327121 is 12172321.
Adding to 12327121 its reverse (12172321), we get a palindrome (24499442).
The square root of 12327121 is 3511.
It is a perfect power (a square), and thus also a powerful number.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12172321 = 7 ⋅1738903.
It is not a de Polignac number, because 12327121 - 25 = 12327089 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (12327127) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1756 + ... + 5266.
It is an arithmetic number, because the mean of its divisors is an integer number (4110211).
It is a Poulet number, since it divides 212327120-1.
Almost surely, 212327121 is an apocalyptic number.
12327121 is the 3511-st square number.
12327121 is the 1756-th centered octagonal number.
It is an amenable number.
12327121 is a deficient number, since it is larger than the sum of its proper divisors (3512).
12327121 is an frugal number, since it uses more digits than its factorization.
12327121 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 7022 (or 3511 counting only the distinct ones).
The product of its digits is 168, while the sum is 19.
The cubic root of 12327121 is about 231.0045600444.
The spelling of 12327121 in words is "twelve million, three hundred twenty-seven thousand, one hundred twenty-one".