221200011100 has 36 divisors (see below), whose sum is σ = 484407754600. Its totient is φ = 87668256960.

The previous prime is 221200011089. The next prime is 221200011127. The reversal of 221200011100 is 1110002122.

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

It is a congruent number.

It is an unprimeable number.

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, 10135890 + ... + 10157689.

Almost surely, 2^221200011100 is an apocalyptic number.

221200011100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221200011100 is an abundant number, since it is smaller than the sum of its proper divisors (263207743500).

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

221200011100 is a wasteful number, since it uses less digits than its factorization.

221200011100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20293702 (or 20293695 counting only the distinct ones).

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

Adding to 221200011100 its reverse (1110002122), we get a palindrome (222310013222).

The spelling of 221200011100 in words is "two hundred twenty-one billion, two hundred million, eleven thousand, one hundred".