21201112 has 32 divisors (see below), whose sum is σ = 42289200. Its totient is φ = 9936000.

The previous prime is 21201109. The next prime is 21201121. The reversal of 21201112 is 21110212.

It is a congruent number.

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, 14662 + ... + 16042.

Almost surely, 2^21201112 is an apocalyptic number.

It is an amenable number.

21201112 is a deficient number, since it is larger than the sum of its proper divisors (21088088).

21201112 is a wasteful number, since it uses less digits than its factorization.

21201112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507 (or 1503 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 21201112 is about 4604.4665271886. The cubic root of 21201112 is about 276.7703396889.

Adding to 21201112 its reverse (21110212), we get a palindrome (42311324).

The spelling of 21201112 in words is "twenty-one million, two hundred one thousand, one hundred twelve".