12021205028 has 12 divisors (see below), whose sum is σ = 24042410112. Its totient is φ = 5151945000.

The previous prime is 12021204973. The next prime is 12021205039. The reversal of 12021205028 is 82050212021.

12021205028 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 12021204994 and 12021205012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214664348 + ... + 214664403.

It is an arithmetic number, because the mean of its divisors is an integer number (2003534176).

Almost surely, 2^12021205028 is an apocalyptic number.

It is an amenable number.

12021205028 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12021205028 is a wasteful number, since it uses less digits than its factorization.

12021205028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429328762 (or 429328760 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 12021205028 its reverse (82050212021), we get a palindrome (94071417049).

The spelling of 12021205028 in words is "twelve billion, twenty-one million, two hundred five thousand, twenty-eight".