21303112 has 16 divisors (see below), whose sum is σ = 40425840. Its totient is φ = 10522896.

The previous prime is 21303109. The next prime is 21303127. The reversal of 21303112 is 21130312.

It is a junction number, because it is equal to n+sod(n) for n = 21303092 and 21303101.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15378 + ... + 16705.

It is an arithmetic number, because the mean of its divisors is an integer number (2526615).

Almost surely, 2^21303112 is an apocalyptic number.

It is an amenable number.

21303112 is a deficient number, since it is larger than the sum of its proper divisors (19122728).

21303112 is a wasteful number, since it uses less digits than its factorization.

21303112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32172 (or 32168 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 21303112 is about 4615.5294387535. The cubic root of 21303112 is about 277.2134834604.

Adding to 21303112 its reverse (21130312), we get a palindrome (42433424).

The spelling of 21303112 in words is "twenty-one million, three hundred three thousand, one hundred twelve".