21101133 has 8 divisors (see below), whose sum is σ = 28236096. Its totient is φ = 14016800.

The previous prime is 21101123. The next prime is 21101207. The reversal of 21101133 is 33110112.

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

It is a cyclic number.

It is not a de Polignac number, because 21101133 - 2²¹ = 19003981 is a prime.

It is a super-3 number, since 3×21101133³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101123) 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, 11673 + ... + 13358.

It is an arithmetic number, because the mean of its divisors is an integer number (3529512).

Almost surely, 2^21101133 is an apocalyptic number.

It is an amenable number.

21101133 is a deficient number, since it is larger than the sum of its proper divisors (7134963).

21101133 is a wasteful number, since it uses less digits than its factorization.

21101133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25315.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 21101133 is about 4593.5969566343. The cubic root of 21101133 is about 276.3345947321.

Adding to 21101133 its reverse (33110112), we get a palindrome (54211245).

The spelling of 21101133 in words is "twenty-one million, one hundred one thousand, one hundred thirty-three".