21332112 has 40 divisors (see below), whose sum is σ = 55323840. Its totient is φ = 7082880.

The previous prime is 21332089. The next prime is 21332119. The reversal of 21332112 is 21123312.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 21332091 and 21332100.

It is not an unprimeable number, because it can be changed into a prime (21332119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14214 + ... + 15642.

It is an arithmetic number, because the mean of its divisors is an integer number (1383096).

Almost surely, 2^21332112 is an apocalyptic number.

It is an amenable number.

21332112 is an abundant number, since it is smaller than the sum of its proper divisors (33991728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21332112 is a wasteful number, since it uses less digits than its factorization.

21332112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751 (or 1745 counting only the distinct ones).

The product of its digits is 72, while the sum is 15.

The square root of 21332112 is about 4618.6699384130. The cubic root of 21332112 is about 277.3392169815.

Adding to 21332112 its reverse (21123312), we get a palindrome (42455424).

The spelling of 21332112 in words is "twenty-one million, three hundred thirty-two thousand, one hundred twelve".