12043121 has 4 divisors (see below), whose sum is σ = 12066672. Its totient is φ = 12019572.

The previous prime is 12043117. The next prime is 12043151. The reversal of 12043121 is 12134021.

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: 12134021 = 97 ⋅125093.

It is a cyclic number.

It is not a de Polignac number, because 12043121 - 2² = 12043117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12043096 and 12043105.

It is not an unprimeable number, because it can be changed into a prime (12043151) 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, 10991 + ... + 12036.

It is an arithmetic number, because the mean of its divisors is an integer number (3016668).

Almost surely, 2^12043121 is an apocalyptic number.

It is an amenable number.

12043121 is a deficient number, since it is larger than the sum of its proper divisors (23551).

12043121 is an equidigital number, since it uses as much as digits as its factorization.

12043121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23550.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 12043121 is about 3470.3200140621. The cubic root of 12043121 is about 229.2167497077.

Adding to 12043121 its reverse (12134021), we get a palindrome (24177142).

The spelling of 12043121 in words is "twelve million, forty-three thousand, one hundred twenty-one".