12021201100000 has 144 divisors (see below), whose sum is σ = 29763053386416. Its totient is φ = 4778974080000.

The previous prime is 12021201099977. The next prime is 12021201100081. The reversal of 12021201100000 is 110212021.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a self number, because there is not a number n which added to its sum of digits gives 12021201100000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15931252 + ... + 16668748.

It is an arithmetic number, because the mean of its divisors is an integer number (206687870739).

Almost surely, 2^{12021201100000} is an apocalyptic number.

12021201100000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12021201100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14881526693208).

12021201100000 is an abundant number, since it is smaller than the sum of its proper divisors (17741852286416).

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

12021201100000 is an frugal number, since it uses more digits than its factorization.

12021201100000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737695 (or 737667 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 12021201100000 its reverse (110212021), we get a palindrome (12021311312021).

The spelling of 12021201100000 in words is "twelve trillion, twenty-one billion, two hundred one million, one hundred thousand".