21200200110 has 24 divisors (see below), whose sum is σ = 55120520520. Its totient is φ = 5653386672.

The previous prime is 21200200093. The next prime is 21200200111. The reversal of 21200200110 is 1100200212.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 21200200092 and 21200200101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200200111) 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, 117778800 + ... + 117778979.

It is an arithmetic number, because the mean of its divisors is an integer number (2296688355).

Almost surely, 2^21200200110 is an apocalyptic number.

21200200110 is an abundant number, since it is smaller than the sum of its proper divisors (33920320410).

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

21200200110 is a wasteful number, since it uses less digits than its factorization.

21200200110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235557792 (or 235557789 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 21200200110 its reverse (1100200212), we get a palindrome (22300400322).

The spelling of 21200200110 in words is "twenty-one billion, two hundred million, two hundred thousand, one hundred ten".