200020021221204 has 144 divisors (see below), whose sum is σ = 538053471730320. Its totient is φ = 62532230584320.

The previous prime is 200020021221187. The next prime is 200020021221247. The reversal of 200020021221204 is 402122120020002.

200020021221204 is a `hidden beast` number, since 20 + 0 + 0 + 200 + 21 + 221 + 204 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 26869688225604 + 173150332995600 = 5183598^2 + 13158660^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19455384 + ... + 27902544.

Almost surely, 2^{200020021221204} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 200020021221204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269026735865160).

200020021221204 is an abundant number, since it is smaller than the sum of its proper divisors (338033450509116).

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

200020021221204 is a wasteful number, since it uses less digits than its factorization.

200020021221204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8447850 (or 8447845 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 200020021221204 its reverse (402122120020002), we get a palindrome (602142141241206).

The spelling of 200020021221204 in words is "two hundred trillion, twenty billion, twenty-one million, two hundred twenty-one thousand, two hundred four".