21112108 has 12 divisors (see below), whose sum is σ = 37195200. Its totient is φ = 10484912.

The previous prime is 21112103. The next prime is 21112121. The reversal of 21112108 is 80121112.

It is a super-2 number, since 2×21112108² = 891442208407328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21112091 and 21112100.

It is not an unprimeable number, because it can be changed into a prime (21112103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17116 + ... + 18307.

It is an arithmetic number, because the mean of its divisors is an integer number (3099600).

Almost surely, 2^21112108 is an apocalyptic number.

It is an amenable number.

21112108 is a deficient number, since it is larger than the sum of its proper divisors (16083092).

21112108 is a wasteful number, since it uses less digits than its factorization.

21112108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35576 (or 35574 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 21112108 is about 4594.7913989647. The cubic root of 21112108 is about 276.3824949488.

The spelling of 21112108 in words is "twenty-one million, one hundred twelve thousand, one hundred eight".