23112311121 has 32 divisors (see below), whose sum is σ = 36662025600. Its totient is φ = 14338874880.

The previous prime is 23112311111. The next prime is 23112311141. The reversal of 23112311121 is 12111321132.

23112311121 is a `hidden beast` number, since 2 + 311 + 231 + 1 + 121 = 666.

It is not a de Polignac number, because 23112311121 - 2⁷ = 23112310993 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23112311094 and 23112311103.

It is not an unprimeable number, because it can be changed into a prime (23112311111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 242035 + ... + 323736.

It is an arithmetic number, because the mean of its divisors is an integer number (1145688300).

Almost surely, 2^23112311121 is an apocalyptic number.

It is an amenable number.

23112311121 is a deficient number, since it is larger than the sum of its proper divisors (13549714479).

23112311121 is a wasteful number, since it uses less digits than its factorization.

23112311121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565886 (or 565880 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 23112311121 its reverse (12111321132), we get a palindrome (35223632253).

The spelling of 23112311121 in words is "twenty-three billion, one hundred twelve million, three hundred eleven thousand, one hundred twenty-one".