210355021300 has 72 divisors (see below), whose sum is σ = 459998667576. Its totient is φ = 83493096960.

The previous prime is 210355021273. The next prime is 210355021321. The reversal of 210355021300 is 3120553012.

It can be written as a sum of positive squares in 12 ways, for example, as 180730415376 + 29624605924 = 425124^2 + 172118^2 .

It is a super-2 number, since 2×210355021300² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12127434 + ... + 12144766.

It is an arithmetic number, because the mean of its divisors is an integer number (6388870383).

Almost surely, 2^210355021300 is an apocalyptic number.

210355021300 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 210355021300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229999333788).

210355021300 is an abundant number, since it is smaller than the sum of its proper divisors (249643646276).

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

210355021300 is a wasteful number, since it uses less digits than its factorization.

210355021300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18277 (or 18270 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

Adding to 210355021300 its reverse (3120553012), we get a palindrome (213475574312).

The spelling of 210355021300 in words is "two hundred ten billion, three hundred fifty-five million, twenty-one thousand, three hundred".