21321332211 has 16 divisors (see below), whose sum is σ = 28992155040. Its totient is φ = 13932871680.

The previous prime is 21321332173. The next prime is 21321332293. The reversal of 21321332211 is 11223312312.

It is not a de Polignac number, because 21321332211 - 2⁶ = 21321332147 is a prime.

It is a super-2 number, since 2×21321332211² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21321332111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107251 + ... + 232691.

It is an arithmetic number, because the mean of its divisors is an integer number (1812009690).

Almost surely, 2^21321332211 is an apocalyptic number.

21321332211 is a deficient number, since it is larger than the sum of its proper divisors (7670822829).

21321332211 is a wasteful number, since it uses less digits than its factorization.

21321332211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126566.

The product of its digits is 432, while the sum is 21.

Adding to 21321332211 its reverse (11223312312), we get a palindrome (32544644523).

The spelling of 21321332211 in words is "twenty-one billion, three hundred twenty-one million, three hundred thirty-two thousand, two hundred eleven".