221000012200 has 192 divisors, whose sum is σ = 576390608640. Its totient is φ = 78105600000.

The previous prime is 221000012197. The next prime is 221000012213. The reversal of 221000012200 is 2210000122.

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 47 ways as a sum of consecutive naturals, for example, 24439680 + ... + 24448720.

It is an arithmetic number, because the mean of its divisors is an integer number (3002034420).

Almost surely, 2^221000012200 is an apocalyptic number.

221000012200 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 221000012200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288195304320).

221000012200 is an abundant number, since it is smaller than the sum of its proper divisors (355390596440).

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

221000012200 is a wasteful number, since it uses less digits than its factorization.

221000012200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9380 (or 9371 counting only the distinct ones).

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

Adding to 221000012200 its reverse (2210000122), we get a palindrome (223210012322).

221000012200 divided by its reverse (2210000122) gives a square (100 = 10²).

The spelling of 221000012200 in words is "two hundred twenty-one billion, twelve thousand, two hundred".