100221201200 has 120 divisors (see below), whose sum is σ = 245394502080. Its totient is φ = 39326976000.

The previous prime is 100221201161. The next prime is 100221201247. The reversal of 100221201200 is 2102122001.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4951100 + ... + 4971300.

It is an arithmetic number, because the mean of its divisors is an integer number (2044954184).

Almost surely, 2^100221201200 is an apocalyptic number.

100221201200 is a gapful number since it is divisible by the number (10) 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 100221201200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122697251040).

100221201200 is an abundant number, since it is smaller than the sum of its proper divisors (145173300880).

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

100221201200 is a wasteful number, since it uses less digits than its factorization.

100221201200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20455 (or 20444 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 100221201200 its reverse (2102122001), we get a palindrome (102323323201).

The spelling of 100221201200 in words is "one hundred billion, two hundred twenty-one million, two hundred one thousand, two hundred".