221550101200 has 60 divisors (see below), whose sum is σ = 533089867788. Its totient is φ = 88484224000.

The previous prime is 221550101197. The next prime is 221550101207. The reversal of 221550101200 is 2101055122.

It can be written as a sum of positive squares in 6 ways, for example, as 2627177536 + 218922923664 = 51256^2 + 467892^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221550101207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162901 + ... + 685300.

Almost surely, 2^221550101200 is an apocalyptic number.

221550101200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221550101200 is an abundant number, since it is smaller than the sum of its proper divisors (311539766588).

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

221550101200 is a wasteful number, since it uses less digits than its factorization.

221550101200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848872 (or 848861 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

Adding to 221550101200 its reverse (2101055122), we get a palindrome (223651156322).

The spelling of 221550101200 in words is "two hundred twenty-one billion, five hundred fifty million, one hundred one thousand, two hundred".