21332013211 has 4 divisors (see below), whose sum is σ = 21333012624. Its totient is φ = 21331013800.

The previous prime is 21332013191. The next prime is 21332013223. The reversal of 21332013211 is 11231023312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21332013211 - 2¹⁷ = 21331882139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21332013271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 466975 + ... + 510616.

It is an arithmetic number, because the mean of its divisors is an integer number (5333253156).

Almost surely, 2^21332013211 is an apocalyptic number.

21332013211 is a deficient number, since it is larger than the sum of its proper divisors (999413).

21332013211 is an equidigital number, since it uses as much as digits as its factorization.

21332013211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999412.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21332013211 its reverse (11231023312), we get a palindrome (32563036523).

The spelling of 21332013211 in words is "twenty-one billion, three hundred thirty-two million, thirteen thousand, two hundred eleven".