21230441133 has 64 divisors (see below), whose sum is σ = 32648935680. Its totient is φ = 12151193600.

The previous prime is 21230441129. The next prime is 21230441173. The reversal of 21230441133 is 33114403212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21230441133 - 2² = 21230441129 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 (21230441123) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 32511835 + ... + 32512487.

It is an arithmetic number, because the mean of its divisors is an integer number (510139620).

Almost surely, 2^21230441133 is an apocalyptic number.

It is an amenable number.

21230441133 is a deficient number, since it is larger than the sum of its proper divisors (11418494547).

21230441133 is a wasteful number, since it uses less digits than its factorization.

21230441133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21230441133 its reverse (33114403212), we get a palindrome (54344844345).

The spelling of 21230441133 in words is "twenty-one billion, two hundred thirty million, four hundred forty-one thousand, one hundred thirty-three".