21210221101300 has 144 divisors (see below), whose sum is σ = 57390490523520. Its totient is φ = 6610148352000.

The previous prime is 21210221101217. The next prime is 21210221101313. The reversal of 21210221101300 is 310112201212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 62670936 + ... + 63008464.

It is an arithmetic number, because the mean of its divisors is an integer number (398545073080).

Almost surely, 2^{21210221101300} is an apocalyptic number.

21210221101300 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 21210221101300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28695245261760).

21210221101300 is an abundant number, since it is smaller than the sum of its proper divisors (36180269422220).

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

21210221101300 is a wasteful number, since it uses less digits than its factorization.

21210221101300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345722 (or 345715 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21210221101300 its reverse (310112201212), we get a palindrome (21520333302512).

The spelling of 21210221101300 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty-one million, one hundred one thousand, three hundred".