21021323332 has 12 divisors (see below), whose sum is σ = 36872672256. Its totient is φ = 10486274120.

The previous prime is 21021323311. The next prime is 21021323333. The reversal of 21021323332 is 23332312012.

It is not an unprimeable number, because it can be changed into a prime (21021323333) 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, 6094948 + ... + 6098395.

It is an arithmetic number, because the mean of its divisors is an integer number (3072722688).

Almost surely, 2^21021323332 is an apocalyptic number.

It is an amenable number.

21021323332 is a deficient number, since it is larger than the sum of its proper divisors (15851348924).

21021323332 is a wasteful number, since it uses less digits than its factorization.

21021323332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12193778 (or 12193776 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21021323332 its reverse (23332312012), we get a palindrome (44353635344).

The spelling of 21021323332 in words is "twenty-one billion, twenty-one million, three hundred twenty-three thousand, three hundred thirty-two".