12424121 has 4 divisors (see below), whose sum is σ = 12688512. Its totient is φ = 12159732.

The previous prime is 12424103. The next prime is 12424123. The reversal of 12424121 is 12142421.

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: 12142421 = 31 ⋅391691.

It is a cyclic number.

It is not a de Polignac number, because 12424121 - 2⁶ = 12424057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12424121.

It is not an unprimeable number, because it can be changed into a prime (12424123) 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, 132125 + ... + 132218.

It is an arithmetic number, because the mean of its divisors is an integer number (3172128).

Almost surely, 2^12424121 is an apocalyptic number.

It is an amenable number.

12424121 is a deficient number, since it is larger than the sum of its proper divisors (264391).

12424121 is an equidigital number, since it uses as much as digits as its factorization.

12424121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264390.

The product of its digits is 128, while the sum is 17.

The square root of 12424121 is about 3524.7866602108. The cubic root of 12424121 is about 231.6088894326.

Adding to 12424121 its reverse (12142421), we get a palindrome (24566542).

The spelling of 12424121 in words is "twelve million, four hundred twenty-four thousand, one hundred twenty-one".