221001100100200 has 96 divisors (see below), whose sum is σ = 589464314904960. Its totient is φ = 75483699897600.

The previous prime is 221001100100173. The next prime is 221001100100203. The reversal of 221001100100200 is 2001001100122.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (221001100100203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 299741931 + ... + 300478330.

It is an arithmetic number, because the mean of its divisors is an integer number (6140253280260).

Almost surely, 2^{221001100100200} is an apocalyptic number.

221001100100200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221001100100200 is an abundant number, since it is smaller than the sum of its proper divisors (368463214804760).

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

221001100100200 is a wasteful number, since it uses less digits than its factorization.

221001100100200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600220547 (or 600220538 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 221001100100200 its reverse (2001001100122), we get a palindrome (223002101200322).

The spelling of 221001100100200 in words is "two hundred twenty-one trillion, one billion, one hundred million, one hundred thousand, two hundred".