21200211223 has 8 divisors (see below), whose sum is σ = 21337492176. Its totient is φ = 21063326400.

The previous prime is 21200211203. The next prime is 21200211239. The reversal of 21200211223 is 32211200212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21200211223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21200211197 and 21200211206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200211203) 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 7 ways as a sum of consecutive naturals, for example, 8728 + ... + 206098.

It is an arithmetic number, because the mean of its divisors is an integer number (2667186522).

Almost surely, 2^21200211223 is an apocalyptic number.

21200211223 is a deficient number, since it is larger than the sum of its proper divisors (137280953).

21200211223 is a wasteful number, since it uses less digits than its factorization.

21200211223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198065.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21200211223 its reverse (32211200212), we get a palindrome (53411411435).

The spelling of 21200211223 in words is "twenty-one billion, two hundred million, two hundred eleven thousand, two hundred twenty-three".