21131332312 has 16 divisors (see below), whose sum is σ = 40013539200. Its totient is φ = 10461055200.

The previous prime is 21131332289. The next prime is 21131332457. The reversal of 21131332312 is 21323313112.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 13075512 + ... + 13077127.

It is an arithmetic number, because the mean of its divisors is an integer number (2500846200).

Almost surely, 2^21131332312 is an apocalyptic number.

It is an amenable number.

21131332312 is a deficient number, since it is larger than the sum of its proper divisors (18882206888).

21131332312 is a wasteful number, since it uses less digits than its factorization.

21131332312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26152746 (or 26152742 counting only the distinct ones).

The product of its digits is 648, while the sum is 22.

Adding to 21131332312 its reverse (21323313112), we get a palindrome (42454645424).

The spelling of 21131332312 in words is "twenty-one billion, one hundred thirty-one million, three hundred thirty-two thousand, three hundred twelve".