21210110222200 has 24 divisors (see below), whose sum is σ = 49313506267080. Its totient is φ = 8484044088800.

The previous prime is 21210110222183. The next prime is 21210110222207. The reversal of 21210110222200 is 222201101212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210110222207) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53025275356 + ... + 53025275755.

It is an arithmetic number, because the mean of its divisors is an integer number (2054729427795).

Almost surely, 2^{21210110222200} is an apocalyptic number.

21210110222200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21210110222200 is an abundant number, since it is smaller than the sum of its proper divisors (28103396044880).

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

21210110222200 is a wasteful number, since it uses less digits than its factorization.

21210110222200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106050551127 (or 106050551118 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21210110222200 its reverse (222201101212), we get a palindrome (21432311323412).

The spelling of 21210110222200 in words is "twenty-one trillion, two hundred ten billion, one hundred ten million, two hundred twenty-two thousand, two hundred".