100221221200 has 60 divisors (see below), whose sum is σ = 251250267168. Its totient is φ = 38345507200.

The previous prime is 100221221171. The next prime is 100221221209. The reversal of 100221221200 is 2122122001.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100221221209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5437606 + ... + 5456005.

Almost surely, 2^100221221200 is an apocalyptic number.

100221221200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100221221200 is an abundant number, since it is smaller than the sum of its proper divisors (151029045968).

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

100221221200 is a wasteful number, since it uses less digits than its factorization.

100221221200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10893652 (or 10893641 counting only the distinct ones).

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

Adding to 100221221200 its reverse (2122122001), we get a palindrome (102343343201).

The spelling of 100221221200 in words is "one hundred billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred".