23123111121 has 32 divisors (see below), whose sum is σ = 37643529600. Its totient is φ = 13911690240.

The previous prime is 23123111117. The next prime is 23123111147. The reversal of 23123111121 is 12111132132.

23123111121 is a `hidden beast` number, since 231 + 2 + 311 + 1 + 121 = 666.

It is not a de Polignac number, because 23123111121 - 2² = 23123111117 is a prime.

It is a super-2 number, since 2×23123111121² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23123111094 and 23123111103.

It is not an unprimeable number, because it can be changed into a prime (23123111021) 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, 243456 + ... + 324833.

It is an arithmetic number, because the mean of its divisors is an integer number (1176360300).

Almost surely, 2^23123111121 is an apocalyptic number.

It is an amenable number.

23123111121 is a deficient number, since it is larger than the sum of its proper divisors (14520418479).

23123111121 is a wasteful number, since it uses less digits than its factorization.

23123111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568446 (or 568440 counting only the distinct ones).

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

Adding to 23123111121 its reverse (12111132132), we get a palindrome (35234243253).

The spelling of 23123111121 in words is "twenty-three billion, one hundred twenty-three million, one hundred eleven thousand, one hundred twenty-one".