221000100221200 has 30 divisors (see below), whose sum is σ = 530952740782394. Its totient is φ = 88400040088320.

The previous prime is 221000100221183. The next prime is 221000100221261. The reversal of 221000100221200 is 2122001000122.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 52407638233344 + 168592461987856 = 7239312^2 + 12984316^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 276250124877 + ... + 276250125676.

Almost surely, 2^{221000100221200} is an apocalyptic number.

221000100221200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221000100221200 is an abundant number, since it is smaller than the sum of its proper divisors (309952640561194).

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

221000100221200 is a wasteful number, since it uses less digits than its factorization.

221000100221200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552500250571 (or 552500250560 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221000100221200 its reverse (2122001000122), we get a palindrome (223122101221322).

The spelling of 221000100221200 in words is "two hundred twenty-one trillion, one hundred million, two hundred twenty-one thousand, two hundred".