211221000010200 has 192 divisors, whose sum is σ = 656867658448800. Its totient is φ = 56146565939200.

The previous prime is 211221000010199. The next prime is 211221000010213. The reversal of 211221000010200 is 2010000122112.

It is a super-2 number, since 2×211221000010200² (a number of 29 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 615954790 + ... + 616297610.

Almost surely, 2^{211221000010200} is an apocalyptic number.

211221000010200 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 211221000010200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328433829224400).

211221000010200 is an abundant number, since it is smaller than the sum of its proper divisors (445646658438600).

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

211221000010200 is a wasteful number, since it uses less digits than its factorization.

211221000010200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346102 (or 346093 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 211221000010200 its reverse (2010000122112), we get a palindrome (213231000132312).

The spelling of 211221000010200 in words is "two hundred eleven trillion, two hundred twenty-one billion, ten thousand, two hundred".