21323220112 has 20 divisors (see below), whose sum is σ = 41523459516. Its totient is φ = 10607488640.

The previous prime is 21323220097. The next prime is 21323220169. The reversal of 21323220112 is 21102232312.

It can be written as a sum of positive squares in 2 ways, for example, as 20162864016 + 1160356096 = 141996^2 + 34064^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21323220112.

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, 3379339 + ... + 3385642.

Almost surely, 2^21323220112 is an apocalyptic number.

It is an amenable number.

21323220112 is a deficient number, since it is larger than the sum of its proper divisors (20200239404).

21323220112 is a wasteful number, since it uses less digits than its factorization.

21323220112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6765186 (or 6765180 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21323220112 its reverse (21102232312), we get a palindrome (42425452424).

The spelling of 21323220112 in words is "twenty-one billion, three hundred twenty-three million, two hundred twenty thousand, one hundred twelve".