12021128 has 16 divisors (see below), whose sum is σ = 25759680. Its totient is φ = 5151888.

The previous prime is 12021071. The next prime is 12021131. The reversal of 12021128 is 82112021.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107276 + ... + 107387.

It is an arithmetic number, because the mean of its divisors is an integer number (1609980).

Almost surely, 2^12021128 is an apocalyptic number.

It is an amenable number.

12021128 is an abundant number, since it is smaller than the sum of its proper divisors (13738552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12021128 is a wasteful number, since it uses less digits than its factorization.

12021128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214676 (or 214672 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 12021128 is about 3467.1498381235. The cubic root of 12021128 is about 229.0771337449.

Adding to 12021128 its reverse (82112021), we get a palindrome (94133149).

The spelling of 12021128 in words is "twelve million, twenty-one thousand, one hundred twenty-eight".