210020021300 has 72 divisors (see below), whose sum is σ = 499191721560. Its totient is φ = 76339916800.

The previous prime is 210020021287. The next prime is 210020021311. The reversal of 210020021300 is 3120020012.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 52091671696 + 157928349604 = 228236^2 + 397402^2 .

It is a congruent number.

It is an unprimeable number.

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, 2080721 + ... + 2179320.

It is an arithmetic number, because the mean of its divisors is an integer number (6933218355).

Almost surely, 2^210020021300 is an apocalyptic number.

210020021300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210020021300 is an abundant number, since it is smaller than the sum of its proper divisors (289171700260).

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

210020021300 is a wasteful number, since it uses less digits than its factorization.

210020021300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4260101 (or 4260094 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 210020021300 its reverse (3120020012), we get a palindrome (213140041312).

The spelling of 210020021300 in words is "two hundred ten billion, twenty million, twenty-one thousand, three hundred".