12021322112 has 64 divisors (see below), whose sum is σ = 24111820800. Its totient is φ = 5969908224.

The previous prime is 12021322111. The next prime is 12021322127. The reversal of 12021322112 is 21122312021.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021322111) 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, 18579773 + ... + 18580419.

It is an arithmetic number, because the mean of its divisors is an integer number (376747200).

Almost surely, 2^12021322112 is an apocalyptic number.

It is an amenable number.

12021322112 is an abundant number, since it is smaller than the sum of its proper divisors (12090498688).

12021322112 is an equidigital number, since it uses as much as digits as its factorization.

12021322112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423 (or 1411 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12021322112 its reverse (21122312021), we get a palindrome (33143634133).

The spelling of 12021322112 in words is "twelve billion, twenty-one million, three hundred twenty-two thousand, one hundred twelve".