12024221 has 4 divisors (see below), whose sum is σ = 13117344. Its totient is φ = 10931100.

The previous prime is 12024211. The next prime is 12024227. The reversal of 12024221 is 12242021.

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: 12242021 = 11 ⋅1112911.

It is a cyclic number.

It is not a de Polignac number, because 12024221 - 2⁶ = 12024157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12024196 and 12024205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12024227) 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, 546545 + ... + 546566.

It is an arithmetic number, because the mean of its divisors is an integer number (3279336).

Almost surely, 2^12024221 is an apocalyptic number.

12024221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12024221 is a deficient number, since it is larger than the sum of its proper divisors (1093123).

12024221 is a wasteful number, since it uses less digits than its factorization.

12024221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093122.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 12024221 is about 3467.5958530371. The cubic root of 12024221 is about 229.0967790122.

Adding to 12024221 its reverse (12242021), we get a palindrome (24266242).

The spelling of 12024221 in words is "twelve million, twenty-four thousand, two hundred twenty-one".