23121163 has 4 divisors (see below), whose sum is σ = 24899728. Its totient is φ = 21342600.

The previous prime is 23121127. The next prime is 23121181. The reversal of 23121163 is 36112132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23121163 - 2⁹ = 23120651 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23121163.

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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 889263 + ... + 889288.

It is an arithmetic number, because the mean of its divisors is an integer number (6224932).

Almost surely, 2^23121163 is an apocalyptic number.

23121163 is a deficient number, since it is larger than the sum of its proper divisors (1778565).

23121163 is a wasteful number, since it uses less digits than its factorization.

23121163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778564.

The product of its digits is 216, while the sum is 19.

The square root of 23121163 is about 4808.4470466045. The cubic root of 23121163 is about 284.8852025605.

Adding to 23121163 its reverse (36112132), we get a palindrome (59233295).

The spelling of 23121163 in words is "twenty-three million, one hundred twenty-one thousand, one hundred sixty-three".