221555200000 has 312 divisors, whose sum is σ = 583571399040. Its totient is φ = 83865600000.

The previous prime is 221555199953. The next prime is 221555200001. The reversal of 221555200000 is 2555122.

221555200000 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (221555200001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 243199545 + ... + 243200455.

Almost surely, 2^221555200000 is an apocalyptic number.

221555200000 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 221555200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (291785699520).

221555200000 is an abundant number, since it is smaller than the sum of its proper divisors (362016199040).

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

221555200000 is an frugal number, since it uses more digits than its factorization.

221555200000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979 (or 937 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

Adding to 221555200000 its reverse (2555122), we get a palindrome (221557755122).

The spelling of 221555200000 in words is "two hundred twenty-one billion, five hundred fifty-five million, two hundred thousand".