23121102054243 has 4 divisors (see below), whose sum is σ = 30828136072328. Its totient is φ = 15414068036160.

The previous prime is 23121102054229. The next prime is 23121102054313. The reversal of 23121102054243 is 34245020112132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 23121102054243 - 2⁴ = 23121102054227 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23121102054243.

It is not an unprimeable number, because it can be changed into a prime (23121102050243) 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, 3853517009038 + ... + 3853517009043.

It is an arithmetic number, because the mean of its divisors is an integer number (7707034018082).

Almost surely, 2^{23121102054243} is an apocalyptic number.

23121102054243 is a deficient number, since it is larger than the sum of its proper divisors (7707034018085).

23121102054243 is an equidigital number, since it uses as much as digits as its factorization.

23121102054243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7707034018084.

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 23121102054243 its reverse (34245020112132), we get a palindrome (57366122166375).

The spelling of 23121102054243 in words is "twenty-three trillion, one hundred twenty-one billion, one hundred two million, fifty-four thousand, two hundred forty-three".