221212110200 has 192 divisors, whose sum is σ = 551325204000. Its totient is φ = 82394224640.

The previous prime is 221212110199. The next prime is 221212110277. The reversal of 221212110200 is 2011212122.

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, 18130502 + ... + 18142698.

Almost surely, 2^221212110200 is an apocalyptic number.

221212110200 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 221212110200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275662602000).

221212110200 is an abundant number, since it is smaller than the sum of its proper divisors (330113093800).

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

221212110200 is a wasteful number, since it uses less digits than its factorization.

221212110200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12354 (or 12345 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221212110200 its reverse (2011212122), we get a palindrome (223223322322).

The spelling of 221212110200 in words is "two hundred twenty-one billion, two hundred twelve million, one hundred ten thousand, two hundred".