23121133 has 16 divisors (see below), whose sum is σ = 27869184. Its totient is φ = 18762480.

The previous prime is 23121127. The next prime is 23121181. The reversal of 23121133 is 33112132.

It is a cyclic number.

It is not a de Polignac number, because 23121133 - 2⁵ = 23121101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121103) 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 15 ways as a sum of consecutive naturals, for example, 9066 + ... + 11332.

It is an arithmetic number, because the mean of its divisors is an integer number (1741824).

Almost surely, 2^23121133 is an apocalyptic number.

It is an amenable number.

23121133 is a deficient number, since it is larger than the sum of its proper divisors (4748051).

23121133 is a wasteful number, since it uses less digits than its factorization.

23121133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2352.

The product of its digits is 108, while the sum is 16.

The square root of 23121133 is about 4808.4439270933. The cubic root of 23121133 is about 284.8850793464.

Adding to 23121133 its reverse (33112132), we get a palindrome (56233265).

Subtracting 23121133 from its reverse (33112132), we obtain a palindrome (9990999).

The spelling of 23121133 in words is "twenty-three million, one hundred twenty-one thousand, one hundred thirty-three".