12412121 has 4 divisors (see below), whose sum is σ = 12812544. Its totient is φ = 12011700.

The previous prime is 12412109. The next prime is 12412129. The reversal of 12412121 is 12121421.

It is a happy number.

12412121 is digitally balanced in base 3, 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: 12121421 = 13 ⋅932417.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12412121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12412096 and 12412105.

It is not an unprimeable number, because it can be changed into a prime (12412129) 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, 200165 + ... + 200226.

It is an arithmetic number, because the mean of its divisors is an integer number (3203136).

Almost surely, 2^12412121 is an apocalyptic number.

It is an amenable number.

12412121 is a deficient number, since it is larger than the sum of its proper divisors (400423).

12412121 is an equidigital number, since it uses as much as digits as its factorization.

12412121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400422.

The product of its digits is 32, while the sum is 14.

The square root of 12412121 is about 3523.0840182999. The cubic root of 12412121 is about 231.5342979192.

Adding to 12412121 its reverse (12121421), we get a palindrome (24533542).

The spelling of 12412121 in words is "twelve million, four hundred twelve thousand, one hundred twenty-one".