21321322312 has 32 divisors (see below), whose sum is σ = 40312843200. Its totient is φ = 10571413824.

The previous prime is 21321322289. The next prime is 21321322349. The reversal of 21321322312 is 21322312312.

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 7 ways as a sum of consecutive naturals, for example, 964293 + ... + 986155.

It is an arithmetic number, because the mean of its divisors is an integer number (1259776350).

Almost surely, 2^21321322312 is an apocalyptic number.

It is an amenable number.

21321322312 is a deficient number, since it is larger than the sum of its proper divisors (18991520888).

21321322312 is a wasteful number, since it uses less digits than its factorization.

21321322312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22885 (or 22881 counting only the distinct ones).

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

Adding to 21321322312 its reverse (21322312312), we get a palindrome (42643634624).

The spelling of 21321322312 in words is "twenty-one billion, three hundred twenty-one million, three hundred twenty-two thousand, three hundred twelve".