23121544426717 has 4 divisors (see below), whose sum is σ = 25223503010976. Its totient is φ = 21019585842460.

The previous prime is 23121544426703. The next prime is 23121544426751. The reversal of 23121544426717 is 71762444512132.

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-23121544426717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121544426787) 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, 1050979292113 + ... + 1050979292134.

It is an arithmetic number, because the mean of its divisors is an integer number (6305875752744).

Almost surely, 2^{23121544426717} is an apocalyptic number.

It is an amenable number.

23121544426717 is a deficient number, since it is larger than the sum of its proper divisors (2101958584259).

23121544426717 is a wasteful number, since it uses less digits than its factorization.

23121544426717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101958584258.

The product of its digits is 2257920, while the sum is 49.

Adding to 23121544426717 its reverse (71762444512132), we get a palindrome (94883988938849).

The spelling of 23121544426717 in words is "twenty-three trillion, one hundred twenty-one billion, five hundred forty-four million, four hundred twenty-six thousand, seven hundred seventeen".