221332520000 has 560 divisors, whose sum is σ = 629591466240. Its totient is φ = 76640256000.

The previous prime is 221332519997. The next prime is 221332520033. The reversal of 221332520000 is 25233122.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 478039769 + ... + 478040231.

Almost surely, 2^221332520000 is an apocalyptic number.

221332520000 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 221332520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314795733120).

221332520000 is an abundant number, since it is smaller than the sum of its proper divisors (408258946240).

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

221332520000 is a wasteful number, since it uses less digits than its factorization.

221332520000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568 (or 543 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

Adding to 221332520000 its reverse (25233122), we get a palindrome (221357753122).

The spelling of 221332520000 in words is "two hundred twenty-one billion, three hundred thirty-two million, five hundred twenty thousand".