21323003112 has 48 divisors (see below), whose sum is σ = 59888687040. Its totient is φ = 7107667056.

The previous prime is 21323003057. The next prime is 21323003131. The reversal of 21323003112 is 21130032312.

21323003112 is a `hidden beast` number, since 21 + 32 + 300 + 311 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5482368 + ... + 5486255.

It is an arithmetic number, because the mean of its divisors is an integer number (1247680980).

Almost surely, 2^21323003112 is an apocalyptic number.

It is an amenable number.

21323003112 is an abundant number, since it is smaller than the sum of its proper divisors (38565683928).

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

21323003112 is a wasteful number, since it uses less digits than its factorization.

21323003112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10968644 (or 10968628 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21323003112 its reverse (21130032312), we get a palindrome (42453035424).

The spelling of 21323003112 in words is "twenty-one billion, three hundred twenty-three million, three thousand, one hundred twelve".