21332321212 has 12 divisors (see below), whose sum is σ = 39296381320. Its totient is φ = 10104783696.

The previous prime is 21332321167. The next prime is 21332321233. The reversal of 21332321212 is 21212323312.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 140344143 + ... + 140344294.

Almost surely, 2^21332321212 is an apocalyptic number.

It is an amenable number.

21332321212 is a deficient number, since it is larger than the sum of its proper divisors (17964060108).

21332321212 is a wasteful number, since it uses less digits than its factorization.

21332321212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280688460 (or 280688458 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

Adding to 21332321212 its reverse (21212323312), we get a palindrome (42544644524).

The spelling of 21332321212 in words is "twenty-one billion, three hundred thirty-two million, three hundred twenty-one thousand, two hundred twelve".