21323022112 has 48 divisors (see below), whose sum is σ = 48241956672. Its totient is φ = 9087932160.

The previous prime is 21323022109. The next prime is 21323022211. The reversal of 21323022112 is 21122032312.

It is a self number, because there is not a number n which added to its sum of digits gives 21323022112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222418 + ... + 303505.

It is an arithmetic number, because the mean of its divisors is an integer number (1005040764).

Almost surely, 2^21323022112 is an apocalyptic number.

It is an amenable number.

21323022112 is an abundant number, since it is smaller than the sum of its proper divisors (26918934560).

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

21323022112 is a wasteful number, since it uses less digits than its factorization.

21323022112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526121 (or 526113 counting only the distinct ones).

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

Adding to 21323022112 its reverse (21122032312), we get a palindrome (42445054424).

The spelling of 21323022112 in words is "twenty-one billion, three hundred twenty-three million, twenty-two thousand, one hundred twelve".