21332311211 has 8 divisors (see below), whose sum is σ = 21437970000. Its totient is φ = 21226695840.

The previous prime is 21332311207. The next prime is 21332311219. The reversal of 21332311211 is 11211323312.

It is a happy number.

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 21332311211 - 2² = 21332311207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21332311219) 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, 1458965 + ... + 1473513.

It is an arithmetic number, because the mean of its divisors is an integer number (2679746250).

Almost surely, 2^21332311211 is an apocalyptic number.

21332311211 is a deficient number, since it is larger than the sum of its proper divisors (105658789).

21332311211 is a wasteful number, since it uses less digits than its factorization.

21332311211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21709.

The product of its digits is 216, while the sum is 20.

Adding to 21332311211 its reverse (11211323312), we get a palindrome (32543634523).

The spelling of 21332311211 in words is "twenty-one billion, three hundred thirty-two million, three hundred eleven thousand, two hundred eleven".