2021021200 has 240 divisors, whose sum is σ = 5754006720. Its totient is φ = 673792000.

The previous prime is 2021021147. The next prime is 2021021207. The reversal of 2021021200 is 21201202.

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

It is not an unprimeable number, because it can be changed into a prime (2021021207) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3066471 + ... + 3067129.

It is an arithmetic number, because the mean of its divisors is an integer number (23975028).

Almost surely, 2^2021021200 is an apocalyptic number.

2021021200 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 2021021200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2877003360).

2021021200 is an abundant number, since it is smaller than the sum of its proper divisors (3732985520).

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

2021021200 is a wasteful number, since it uses less digits than its factorization.

2021021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746 (or 735 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 2021021200 is about 44955.7693739080. The cubic root of 2021021200 is about 1264.3198497568.

Adding to 2021021200 its reverse (21201202), we get a palindrome (2042222402).

It can be divided in two parts, 202102 and 1200, that added together give a palindrome (203302).

The spelling of 2021021200 in words is "two billion, twenty-one million, twenty-one thousand, two hundred".