221220201200 has 120 divisors (see below), whose sum is σ = 551062386000. Its totient is φ = 85241927680.

The previous prime is 221220201197. The next prime is 221220201203. The reversal of 221220201200 is 2102022122.

It is an interprime number because it is at equal distance from previous prime (221220201197) and next prime (221220201203).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220201203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5117276 + ... + 5160324.

It is an arithmetic number, because the mean of its divisors is an integer number (4592186550).

Almost surely, 2^221220201200 is an apocalyptic number.

221220201200 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 221220201200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275531193000).

221220201200 is an abundant number, since it is smaller than the sum of its proper divisors (329842184800).

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

221220201200 is a wasteful number, since it uses less digits than its factorization.

221220201200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43539 (or 43528 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 221220201200 its reverse (2102022122), we get a palindrome (223322223322).

The spelling of 221220201200 in words is "two hundred twenty-one billion, two hundred twenty million, two hundred one thousand, two hundred".