12021222221200 has 60 divisors (see below), whose sum is σ = 29091796638660. Its totient is φ = 4773390407680.

The previous prime is 12021222221143. The next prime is 12021222221213. The reversal of 12021222221200 is 212222212021.

12021222221200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 725815394704 + 11295406826496 = 851948^2 + 3360864^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109627885 + ... + 109737484.

It is an arithmetic number, because the mean of its divisors is an integer number (484863277311).

Almost surely, 2^{12021222221200} is an apocalyptic number.

12021222221200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021222221200 is an abundant number, since it is smaller than the sum of its proper divisors (17070574417460).

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

12021222221200 is a wasteful number, since it uses less digits than its factorization.

12021222221200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219365524 (or 219365513 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 12021222221200 its reverse (212222212021), we get a palindrome (12233444433221).

The spelling of 12021222221200 in words is "twelve trillion, twenty-one billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred".