12066021 has 24 divisors (see below), whose sum is σ = 19123104. Its totient is φ = 7270560.

The previous prime is 12065993. The next prime is 12066023.

It is a happy number.

12066021 is a `hidden beast` number, since 1 + 2 + 0 + 660 + 2 + 1 = 666.

12066021 is nontrivially palindromic in base 10.

12066021 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12066021 - 2⁹ = 12065509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12065985 and 12066003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12066023) 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, 30195 + ... + 30591.

It is an arithmetic number, because the mean of its divisors is an integer number (796796).

Almost surely, 2^12066021 is an apocalyptic number.

12066021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12066021 is a deficient number, since it is larger than the sum of its proper divisors (7057083).

12066021 is a wasteful number, since it uses less digits than its factorization.

12066021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721 (or 718 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 12066021 is about 3473.6178546294. The cubic root of 12066021 is about 229.3619429691.

It can be divided in two parts, 1206 and 6021, that added together give a palindrome (7227).

The spelling of 12066021 in words is "twelve million, sixty-six thousand, twenty-one".