20210221200 has 360 divisors, whose sum is σ = 70971679744. Its totient is φ = 4886784000.

The previous prime is 20210221159. The next prime is 20210221217. The reversal of 20210221200 is 212201202.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 159135537 + ... + 159135663.

Almost surely, 2^20210221200 is an apocalyptic number.

20210221200 is a gapful number since it is divisible by the number (20) 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 20210221200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35485839872).

20210221200 is an abundant number, since it is smaller than the sum of its proper divisors (50761458544).

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

20210221200 is a wasteful number, since it uses less digits than its factorization.

20210221200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20210221200 its reverse (212201202), we get a palindrome (20422422402).

The spelling of 20210221200 in words is "twenty billion, two hundred ten million, two hundred twenty-one thousand, two hundred".