210221221300 has 72 divisors (see below), whose sum is σ = 478006905600. Its totient is φ = 80095720320.

The previous prime is 210221221297. The next prime is 210221221307. The reversal of 210221221300 is 3122122012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210221221307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 358486 + ... + 740914.

It is an arithmetic number, because the mean of its divisors is an integer number (6638984800).

Almost surely, 2^210221221300 is an apocalyptic number.

210221221300 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 210221221300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239003452800).

210221221300 is an abundant number, since it is smaller than the sum of its proper divisors (267785684300).

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

210221221300 is a wasteful number, since it uses less digits than its factorization.

210221221300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382705 (or 382698 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 210221221300 its reverse (3122122012), we get a palindrome (213343343312).

The spelling of 210221221300 in words is "two hundred ten billion, two hundred twenty-one million, two hundred twenty-one thousand, three hundred".