23117121 has 6 divisors (see below), whose sum is σ = 33391410. Its totient is φ = 15411408.

The previous prime is 23117111. The next prime is 23117141. The reversal of 23117121 is 12171132.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 21762225 + 1354896 = 4665^2 + 1164^2 .

It is not a de Polignac number, because 23117121 - 2⁹ = 23116609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23117094 and 23117103.

It is not an unprimeable number, because it can be changed into a prime (23117111) 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 5 ways as a sum of consecutive naturals, for example, 1284276 + ... + 1284293.

It is an arithmetic number, because the mean of its divisors is an integer number (5565235).

Almost surely, 2^23117121 is an apocalyptic number.

It is an amenable number.

23117121 is a deficient number, since it is larger than the sum of its proper divisors (10274289).

23117121 is a wasteful number, since it uses less digits than its factorization.

23117121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2568575 (or 2568572 counting only the distinct ones).

The product of its digits is 84, while the sum is 18.

The square root of 23117121 is about 4808.0267262152. The cubic root of 23117121 is about 284.8686005540.

Adding to 23117121 its reverse (12171132), we get a palindrome (35288253).

The spelling of 23117121 in words is "twenty-three million, one hundred seventeen thousand, one hundred twenty-one".