21112612 has 12 divisors (see below), whose sum is σ = 38139136. Its totient is φ = 10215720.

The previous prime is 21112601. The next prime is 21112633. The reversal of 21112612 is 21621112.

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, 85008 + ... + 85255.

Almost surely, 2^21112612 is an apocalyptic number.

It is an amenable number.

21112612 is a deficient number, since it is larger than the sum of its proper divisors (17026524).

21112612 is a wasteful number, since it uses less digits than its factorization.

21112612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170298 (or 170296 counting only the distinct ones).

The product of its digits is 48, while the sum is 16.

The square root of 21112612 is about 4594.8462433470. The cubic root of 21112612 is about 276.3846942503.

Adding to 21112612 its reverse (21621112), we get a palindrome (42733724).

The spelling of 21112612 in words is "twenty-one million, one hundred twelve thousand, six hundred twelve".