2021201221200 has 120 divisors (see below), whose sum is σ = 7399521453888. Its totient is φ = 461988848640.

The previous prime is 2021201221199. The next prime is 2021201221243. The reversal of 2021201221200 is 21221021202.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2021201221200.

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, 120301197 + ... + 120317996.

Almost surely, 2^{2021201221200} is an apocalyptic number.

2021201221200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021201221200 is an abundant number, since it is smaller than the sum of its proper divisors (5378320232688).

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

2021201221200 is a wasteful number, since it uses less digits than its factorization.

2021201221200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240619221 (or 240619210 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2021201221200 its reverse (21221021202), we get a palindrome (2042422242402).

The spelling of 2021201221200 in words is "two trillion, twenty-one billion, two hundred one million, two hundred twenty-one thousand, two hundred".