210221000220 has 192 divisors, whose sum is σ = 734301904896. Its totient is φ = 43656126720.

The previous prime is 210221000189. The next prime is 210221000221. The reversal of 210221000220 is 22000122012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 210221000196 and 210221000205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210221000221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8243209 + ... + 8268671.

It is an arithmetic number, because the mean of its divisors is an integer number (3824489088).

Almost surely, 2^210221000220 is an apocalyptic number.

210221000220 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 210221000220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (367150952448).

210221000220 is an abundant number, since it is smaller than the sum of its proper divisors (524080904676).

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

210221000220 is a wasteful number, since it uses less digits than its factorization.

210221000220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27280 (or 27278 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 210221000220 its reverse (22000122012), we get a palindrome (232221122232).

The spelling of 210221000220 in words is "two hundred ten billion, two hundred twenty-one million, two hundred twenty", and thus it is an aban number.