21021231332 has 24 divisors (see below), whose sum is σ = 36860084352. Its totient is φ = 10489802400.

The previous prime is 21021231331. The next prime is 21021231337. The reversal of 21021231332 is 23313212012.

It is not an unprimeable number, because it can be changed into a prime (21021231331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6606782 + ... + 6609962.

It is an arithmetic number, because the mean of its divisors is an integer number (1535836848).

Almost surely, 2^21021231332 is an apocalyptic number.

It is an amenable number.

21021231332 is a deficient number, since it is larger than the sum of its proper divisors (15838853020).

21021231332 is a wasteful number, since it uses less digits than its factorization.

21021231332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5939 (or 5937 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21021231332 its reverse (23313212012), we get a palindrome (44334443344).

The spelling of 21021231332 in words is "twenty-one billion, twenty-one million, two hundred thirty-one thousand, three hundred thirty-two".