23105311121 has 4 divisors (see below), whose sum is σ = 23105755632. Its totient is φ = 23104866612.

The previous prime is 23105311111. The next prime is 23105311123. The reversal of 23105311121 is 12111350132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23105311121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23105311093 and 23105311102.

It is not an unprimeable number, because it can be changed into a prime (23105311123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132095 + ... + 252308.

It is an arithmetic number, because the mean of its divisors is an integer number (5776438908).

Almost surely, 2^23105311121 is an apocalyptic number.

It is an amenable number.

23105311121 is a deficient number, since it is larger than the sum of its proper divisors (444511).

23105311121 is an equidigital number, since it uses as much as digits as its factorization.

23105311121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444510.

The product of its (nonzero) digits is 180, while the sum is 20.

Adding to 23105311121 its reverse (12111350132), we get a palindrome (35216661253).

The spelling of 23105311121 in words is "twenty-three billion, one hundred five million, three hundred eleven thousand, one hundred twenty-one".