23121331121 has 16 divisors (see below), whose sum is σ = 27660976128. Its totient is φ = 18908845200.

The previous prime is 23121331073. The next prime is 23121331127. The reversal of 23121331121 is 12113312132.

It is a happy number.

It is not a de Polignac number, because 23121331121 - 2¹⁴ = 23121314737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23121331093 and 23121331102.

It is not an unprimeable number, because it can be changed into a prime (23121331127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 734945 + ... + 765758.

It is an arithmetic number, because the mean of its divisors is an integer number (1728811008).

Almost surely, 2^23121331121 is an apocalyptic number.

It is an amenable number.

23121331121 is a deficient number, since it is larger than the sum of its proper divisors (4539645007).

23121331121 is a wasteful number, since it uses less digits than its factorization.

23121331121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500812.

The product of its digits is 216, while the sum is 20.

Adding to 23121331121 its reverse (12113312132), we get a palindrome (35234643253).

The spelling of 23121331121 in words is "twenty-three billion, one hundred twenty-one million, three hundred thirty-one thousand, one hundred twenty-one".