21200202110 has 32 divisors (see below), whose sum is σ = 39336606720. Its totient is φ = 8222067232.

The previous prime is 21200202077. The next prime is 21200202139. The reversal of 21200202110 is 1120200212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21200202091 and 21200202100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160490 + ... + 261069.

It is an arithmetic number, because the mean of its divisors is an integer number (1229268960).

Almost surely, 2^21200202110 is an apocalyptic number.

21200202110 is a deficient number, since it is larger than the sum of its proper divisors (18136404610).

21200202110 is a wasteful number, since it uses less digits than its factorization.

21200202110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421720.

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

Adding to 21200202110 its reverse (1120200212), we get a palindrome (22320402322).

The spelling of 21200202110 in words is "twenty-one billion, two hundred million, two hundred two thousand, one hundred ten".