21303332011 has 24 divisors (see below), whose sum is σ = 23481500064. Its totient is φ = 19313199360.

The previous prime is 21303331991. The next prime is 21303332023. The reversal of 21303332011 is 11023330312.

It is not a de Polignac number, because 21303332011 - 2¹¹ = 21303329963 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21303332011.

It is not an unprimeable number, because it can be changed into a prime (21303330011) 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 23 ways as a sum of consecutive naturals, for example, 9967735 + ... + 9969871.

It is an arithmetic number, because the mean of its divisors is an integer number (978395836).

Almost surely, 2^21303332011 is an apocalyptic number.

21303332011 is a deficient number, since it is larger than the sum of its proper divisors (2178168053).

21303332011 is a wasteful number, since it uses less digits than its factorization.

21303332011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3191 (or 3178 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21303332011 its reverse (11023330312), we get a palindrome (32326662323).

The spelling of 21303332011 in words is "twenty-one billion, three hundred three million, three hundred thirty-two thousand, eleven".