12055221 has 24 divisors (see below), whose sum is σ = 17971200. Its totient is φ = 7783776.

The previous prime is 12055207. The next prime is 12055231. The reversal of 12055221 is 12255021.

12055221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12055221 - 2¹⁰ = 12054197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12055194 and 12055203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12055231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60480 + ... + 60678.

It is an arithmetic number, because the mean of its divisors is an integer number (748800).

Almost surely, 2^12055221 is an apocalyptic number.

It is an amenable number.

12055221 is a deficient number, since it is larger than the sum of its proper divisors (5915979).

12055221 is a wasteful number, since it uses less digits than its factorization.

12055221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 12055221 is about 3472.0629314573. The cubic root of 12055221 is about 229.2934904549.

Subtracting from 12055221 its product of nonzero digits (200), we obtain a palindrome (12055021).

The spelling of 12055221 in words is "twelve million, fifty-five thousand, two hundred twenty-one".