21223300211 has 4 divisors (see below), whose sum is σ = 21223948152. Its totient is φ = 21222652272.

The previous prime is 21223300201. The next prime is 21223300249. The reversal of 21223300211 is 11200332212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21223300211 - 2¹⁴ = 21223283827 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21223300211.

It is not an unprimeable number, because it can be changed into a prime (21223300201) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 272066 + ... + 341271.

It is an arithmetic number, because the mean of its divisors is an integer number (5305987038).

Almost surely, 2^21223300211 is an apocalyptic number.

21223300211 is a deficient number, since it is larger than the sum of its proper divisors (647941).

21223300211 is an equidigital number, since it uses as much as digits as its factorization.

21223300211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647940.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21223300211 its reverse (11200332212), we get a palindrome (32423632423).

The spelling of 21223300211 in words is "twenty-one billion, two hundred twenty-three million, three hundred thousand, two hundred eleven".