210221470000 has 100 divisors (see below), whose sum is σ = 509412998160. Its totient is φ = 84014944000.

The previous prime is 210221469961. The next prime is 210221470031. The reversal of 210221470000 is 74122012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (100).

It is a self number, because there is not a number n which added to its sum of digits gives 210221470000.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12221406 + ... + 12238594.

Almost surely, 2^210221470000 is an apocalyptic number.

210221470000 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 210221470000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254706499080).

210221470000 is an abundant number, since it is smaller than the sum of its proper divisors (299191528160).

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

210221470000 is a wasteful number, since it uses less digits than its factorization.

210221470000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18440 (or 18419 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

Adding to 210221470000 its reverse (74122012), we get a palindrome (210295592012).

The spelling of 210221470000 in words is "two hundred ten billion, two hundred twenty-one million, four hundred seventy thousand".