23511434431121 has 8 divisors (see below), whose sum is σ = 28937150069184. Its totient is φ = 18602453615760.

The previous prime is 23511434431109. The next prime is 23511434431129. The reversal of 23511434431121 is 12113443411532.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-23511434431121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23511434431129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129183705575 + ... + 129183705756.

It is an arithmetic number, because the mean of its divisors is an integer number (3617143758648).

Almost surely, 2^{23511434431121} is an apocalyptic number.

It is an amenable number.

23511434431121 is a deficient number, since it is larger than the sum of its proper divisors (5425715638063).

23511434431121 is a wasteful number, since it uses less digits than its factorization.

23511434431121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258367411351.

The product of its digits is 34560, while the sum is 35.

Adding to 23511434431121 its reverse (12113443411532), we get a palindrome (35624877842653).

The spelling of 23511434431121 in words is "twenty-three trillion, five hundred eleven billion, four hundred thirty-four million, four hundred thirty-one thousand, one hundred twenty-one".