221210000200 has 144 divisors (see below), whose sum is σ = 600419355300. Its totient is φ = 75572582400.

The previous prime is 221210000177. The next prime is 221210000233. The reversal of 221210000200 is 2000012122.

It can be written as a sum of positive squares in 6 ways, for example, as 138462875236 + 82747124964 = 372106^2 + 287658^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2713636 + ... + 2793964.

Almost surely, 2^221210000200 is an apocalyptic number.

221210000200 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 221210000200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300209677650).

221210000200 is an abundant number, since it is smaller than the sum of its proper divisors (379209355100).

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

221210000200 is a wasteful number, since it uses less digits than its factorization.

221210000200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80640 (or 80624 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 221210000200 its reverse (2000012122), we get a palindrome (223210012322).

The spelling of 221210000200 in words is "two hundred twenty-one billion, two hundred ten million, two hundred", and thus it is an aban number.