21103112 has 16 divisors (see below), whose sum is σ = 40070400. Its totient is φ = 10417680.

The previous prime is 21103109. The next prime is 21103123. The reversal of 21103112 is 21130112.

It is a junction number, because it is equal to n+sod(n) for n = 21103093 and 21103102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16064 + ... + 17327.

It is an arithmetic number, because the mean of its divisors is an integer number (2504400).

Almost surely, 2^21103112 is an apocalyptic number.

It is an amenable number.

21103112 is a deficient number, since it is larger than the sum of its proper divisors (18967288).

21103112 is a wasteful number, since it uses less digits than its factorization.

21103112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33476 (or 33472 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 21103112 is about 4593.8123601209. The cubic root of 21103112 is about 276.3432332740.

Adding to 21103112 its reverse (21130112), we get a palindrome (42233224).

Subtracting 21103112 from its reverse (21130112), we obtain a cube (27000 = 30³).

The spelling of 21103112 in words is "twenty-one million, one hundred three thousand, one hundred twelve".