13111111312001 has 4 divisors (see below), whose sum is σ = 13358490770772. Its totient is φ = 12863731853232.

The previous prime is 13111111311989. The next prime is 13111111312021. The reversal of 13111111312001 is 10021311111131.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3989207290000 + 9121904022001 = 1997300^2 + 3020249^2 .

It is a cyclic number.

It is not a de Polignac number, because 13111111312001 - 2⁶ = 13111111311937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13111111312021) 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, 123689729306 + ... + 123689729411.

It is an arithmetic number, because the mean of its divisors is an integer number (3339622692693).

Almost surely, 2^{13111111312001} is an apocalyptic number.

It is an amenable number.

13111111312001 is a deficient number, since it is larger than the sum of its proper divisors (247379458771).

13111111312001 is an equidigital number, since it uses as much as digits as its factorization.

13111111312001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247379458770.

The product of its (nonzero) digits is 18, while the sum is 17.

Adding to 13111111312001 its reverse (10021311111131), we get a palindrome (23132422423132).

The spelling of 13111111312001 in words is "thirteen trillion, one hundred eleven billion, one hundred eleven million, three hundred twelve thousand, one".