21323113112 has 32 divisors (see below), whose sum is σ = 45770296320. Its totient is φ = 9122894880.

The previous prime is 21323113103. The next prime is 21323113151. The reversal of 21323113112 is 21131132312.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 291464 + ... + 357207.

It is an arithmetic number, because the mean of its divisors is an integer number (1430321760).

Almost surely, 2^21323113112 is an apocalyptic number.

It is an amenable number.

21323113112 is an abundant number, since it is smaller than the sum of its proper divisors (24447183208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21323113112 is a wasteful number, since it uses less digits than its factorization.

21323113112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649271 (or 649267 counting only the distinct ones).

The product of its digits is 216, while the sum is 20.

Adding to 21323113112 its reverse (21131132312), we get a palindrome (42454245424).

The spelling of 21323113112 in words is "twenty-one billion, three hundred twenty-three million, one hundred thirteen thousand, one hundred twelve".