21103330211 has 8 divisors (see below), whose sum is σ = 21625380000. Its totient is φ = 20581629760.

The previous prime is 21103330201. The next prime is 21103330219. The reversal of 21103330211 is 11203330112.

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

It is a cyclic number.

It is not a de Polignac number, because 21103330211 - 2⁶ = 21103330147 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 21103330211.

It is not an unprimeable number, because it can be changed into a prime (21103330219) 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, 37145 + ... + 208773.

It is an arithmetic number, because the mean of its divisors is an integer number (2703172500).

Almost surely, 2^21103330211 is an apocalyptic number.

21103330211 is a deficient number, since it is larger than the sum of its proper divisors (522049789).

21103330211 is a wasteful number, since it uses less digits than its factorization.

21103330211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174669.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21103330211 its reverse (11203330112), we get a palindrome (32306660323).

Subtracting from 21103330211 its reverse (11203330112), we obtain a palindrome (9900000099).

The spelling of 21103330211 in words is "twenty-one billion, one hundred three million, three hundred thirty thousand, two hundred eleven".