21332213331 has 16 divisors (see below), whose sum is σ = 33415495680. Its totient is φ = 11934105120.

The previous prime is 21332213291. The next prime is 21332213341. The reversal of 21332213331 is 13331223312.

It is not a de Polignac number, because 21332213331 - 2⁶ = 21332213267 is a prime.

It is a super-2 number, since 2×21332213331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21332213341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24862291 + ... + 24863148.

It is an arithmetic number, because the mean of its divisors is an integer number (2088468480).

Almost surely, 2^21332213331 is an apocalyptic number.

21332213331 is a deficient number, since it is larger than the sum of its proper divisors (12083282349).

21332213331 is a wasteful number, since it uses less digits than its factorization.

21332213331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49725466.

The product of its digits is 1944, while the sum is 24.

Adding to 21332213331 its reverse (13331223312), we get a palindrome (34663436643).

The spelling of 21332213331 in words is "twenty-one billion, three hundred thirty-two million, two hundred thirteen thousand, three hundred thirty-one".