221131201200 has 480 divisors, whose sum is σ = 873110784000. Its totient is φ = 46587432960.

The previous prime is 221131201177. The next prime is 221131201229. The reversal of 221131201200 is 2102131122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 221131201200.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 113457826 + ... + 113459774.

It is an arithmetic number, because the mean of its divisors is an integer number (1818980800).

Almost surely, 2^221131201200 is an apocalyptic number.

221131201200 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 221131201200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (436555392000).

221131201200 is an abundant number, since it is smaller than the sum of its proper divisors (651979582800).

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

221131201200 is a wasteful number, since it uses less digits than its factorization.

221131201200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3029 (or 3018 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 221131201200 its reverse (2102131122), we get a palindrome (223233332322).

The spelling of 221131201200 in words is "two hundred twenty-one billion, one hundred thirty-one million, two hundred one thousand, two hundred".