21041133 has 8 divisors (see below), whose sum is σ = 28202496. Its totient is φ = 13953600.

The previous prime is 21041117. The next prime is 21041191. The reversal of 21041133 is 33114012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21041133 - 2⁴ = 21041117 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21041533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17788 + ... + 18933.

It is an arithmetic number, because the mean of its divisors is an integer number (3525312).

Almost surely, 2^21041133 is an apocalyptic number.

It is an amenable number.

21041133 is a deficient number, since it is larger than the sum of its proper divisors (7161363).

21041133 is a wasteful number, since it uses less digits than its factorization.

21041133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36915.

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

The square root of 21041133 is about 4587.0614776783. The cubic root of 21041133 is about 276.0724316305.

Adding to 21041133 its reverse (33114012), we get a palindrome (54155145).

It can be divided in two parts, 2104 and 1133, that multiplied together give a palindrome (2383832).

The spelling of 21041133 in words is "twenty-one million, forty-one thousand, one hundred thirty-three".