21033112 has 8 divisors (see below), whose sum is σ = 39437100. Its totient is φ = 10516552.

The previous prime is 21033083. The next prime is 21033119. The reversal of 21033112 is 21133012.

21033112 is nontrivially palindromic in base 14.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 21033092 and 21033101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1314562 + ... + 1314577.

Almost surely, 2^21033112 is an apocalyptic number.

It is an amenable number.

21033112 is a deficient number, since it is larger than the sum of its proper divisors (18403988).

21033112 is a wasteful number, since it uses less digits than its factorization.

21033112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2629145 (or 2629141 counting only the distinct ones).

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

The square root of 21033112 is about 4586.1870873308. The cubic root of 21033112 is about 276.0373470430.

Adding to 21033112 its reverse (21133012), we get a palindrome (42166124).

The spelling of 21033112 in words is "twenty-one million, thirty-three thousand, one hundred twelve".