23121134243 has 4 divisors (see below), whose sum is σ = 23202834648. Its totient is φ = 23039433840.

The previous prime is 23121134233. The next prime is 23121134263. The reversal of 23121134243 is 34243112132.

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 23121134243 - 2⁴ = 23121134227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23121134233) 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, 40849778 + ... + 40850343.

It is an arithmetic number, because the mean of its divisors is an integer number (5800708662).

Almost surely, 2^23121134243 is an apocalyptic number.

23121134243 is a deficient number, since it is larger than the sum of its proper divisors (81700405).

23121134243 is an equidigital number, since it uses as much as digits as its factorization.

23121134243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81700404.

The product of its digits is 3456, while the sum is 26.

Adding to 23121134243 its reverse (34243112132), we get a palindrome (57364246375).

The spelling of 23121134243 in words is "twenty-three billion, one hundred twenty-one million, one hundred thirty-four thousand, two hundred forty-three".