23121130231 has 4 divisors (see below), whose sum is σ = 23248871464. Its totient is φ = 22993389000.

The previous prime is 23121130223. The next prime is 23121130261. The reversal of 23121130231 is 13203112132.

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 23121130231 - 2³ = 23121130223 is a prime.

It is a super-2 number, since 2×23121130231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23121130199 and 23121130208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121130261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63870345 + ... + 63870706.

It is an arithmetic number, because the mean of its divisors is an integer number (5812217866).

Almost surely, 2^23121130231 is an apocalyptic number.

23121130231 is a deficient number, since it is larger than the sum of its proper divisors (127741233).

23121130231 is a wasteful number, since it uses less digits than its factorization.

23121130231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127741232.

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

Adding to 23121130231 its reverse (13203112132), we get a palindrome (36324242363).

The spelling of 23121130231 in words is "twenty-three billion, one hundred twenty-one million, one hundred thirty thousand, two hundred thirty-one".