21330030211 has 40 divisors (see below), whose sum is σ = 26903268880. Its totient is φ = 16851167424.

The previous prime is 21330030193. The next prime is 21330030223. The reversal of 21330030211 is 11203003312.

It is not a de Polignac number, because 21330030211 - 2²¹ = 21327933059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21330030511) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1681585 + ... + 1694221.

It is an arithmetic number, because the mean of its divisors is an integer number (672581722).

Almost surely, 2^21330030211 is an apocalyptic number.

21330030211 is a deficient number, since it is larger than the sum of its proper divisors (5573238669).

21330030211 is an equidigital number, since it uses as much as digits as its factorization.

21330030211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12721 (or 12700 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21330030211 its reverse (11203003312), we get a palindrome (32533033523).

The spelling of 21330030211 in words is "twenty-one billion, three hundred thirty million, thirty thousand, two hundred eleven".