12047221 has 4 divisors (see below), whose sum is σ = 12059392. Its totient is φ = 12035052.

The previous prime is 12047219. The next prime is 12047227. The reversal of 12047221 is 12274021.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 12047221 - 2¹ = 12047219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12047227) 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, 4455 + ... + 6628.

It is an arithmetic number, because the mean of its divisors is an integer number (3014848).

Almost surely, 2^12047221 is an apocalyptic number.

It is an amenable number.

12047221 is a deficient number, since it is larger than the sum of its proper divisors (12171).

12047221 is a wasteful number, since it uses less digits than its factorization.

12047221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12170.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 12047221 is about 3470.9106874133. The cubic root of 12047221 is about 229.2427585262.

The spelling of 12047221 in words is "twelve million, forty-seven thousand, two hundred twenty-one".