210221010320 has 40 divisors (see below), whose sum is σ = 488927274360. Its totient is φ = 84060288000.

The previous prime is 210221010301. The next prime is 210221010323. The reversal of 210221010320 is 23010122012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17117012224 + 193103998096 = 130832^2 + 439436^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 210221010295 and 210221010304.

It is not an unprimeable number, because it can be changed into a prime (210221010323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197735 + ... + 677894.

It is an arithmetic number, because the mean of its divisors is an integer number (12223181859).

Almost surely, 2^210221010320 is an apocalyptic number.

210221010320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210221010320 is an abundant number, since it is smaller than the sum of its proper divisors (278706264040).

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

210221010320 is a wasteful number, since it uses less digits than its factorization.

210221010320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878643 (or 878637 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 210221010320 its reverse (23010122012), we get a palindrome (233231132332).

The spelling of 210221010320 in words is "two hundred ten billion, two hundred twenty-one million, ten thousand, three hundred twenty".