12021016 has 32 divisors (see below), whose sum is σ = 26036640. Its totient is φ = 5096448.

The previous prime is 12021013. The next prime is 12021017. The reversal of 12021016 is 61012021.

It is a junction number, because it is equal to n+sod(n) for n = 12020987 and 12021005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021013) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4326 + ... + 6538.

It is an arithmetic number, because the mean of its divisors is an integer number (813645).

Almost surely, 2^12021016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12021016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13018320).

12021016 is an abundant number, since it is smaller than the sum of its proper divisors (14015624).

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

12021016 is a wasteful number, since it uses less digits than its factorization.

12021016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2323 (or 2319 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 12021016 is about 3467.1336864909. The cubic root of 12021016 is about 229.0764223109.

Adding to 12021016 its reverse (61012021), we get a palindrome (73033037).

The spelling of 12021016 in words is "twelve million, twenty-one thousand, sixteen".