12523404121111 has 8 divisors (see below), whose sum is σ = 13517464415840. Its totient is φ = 11533732614432.

The previous prime is 12523404121051. The next prime is 12523404121117. The reversal of 12523404121111 is 11112140432521.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12523404121111 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 12523404121111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12523404121117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1097191080 + ... + 1097202493.

It is an arithmetic number, because the mean of its divisors is an integer number (1689683051980).

Almost surely, 2^{12523404121111} is an apocalyptic number.

12523404121111 is a deficient number, since it is larger than the sum of its proper divisors (994060294729).

12523404121111 is a wasteful number, since it uses less digits than its factorization.

12523404121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2194394025.

The product of its (nonzero) digits is 1920, while the sum is 28.

Adding to 12523404121111 its reverse (11112140432521), we get a palindrome (23635544553632).

The spelling of 12523404121111 in words is "twelve trillion, five hundred twenty-three billion, four hundred four million, one hundred twenty-one thousand, one hundred eleven".