13166115311023 has 4 divisors (see below), whose sum is σ = 13389269807880. Its totient is φ = 12942960814168.

The previous prime is 13166115311017. The next prime is 13166115311081. The reversal of 13166115311023 is 32011351166131.

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

It is a cyclic number.

It is not a de Polignac number, because 13166115311023 - 2⁵ = 13166115310991 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 13166115311023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13166115371023) 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, 111577248340 + ... + 111577248457.

It is an arithmetic number, because the mean of its divisors is an integer number (3347317451970).

Almost surely, 2^{13166115311023} is an apocalyptic number.

13166115311023 is a deficient number, since it is larger than the sum of its proper divisors (223154496857).

13166115311023 is an equidigital number, since it uses as much as digits as its factorization.

13166115311023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223154496856.

The product of its (nonzero) digits is 9720, while the sum is 34.

Adding to 13166115311023 its reverse (32011351166131), we get a palindrome (45177466477154).

The spelling of 13166115311023 in words is "thirteen trillion, one hundred sixty-six billion, one hundred fifteen million, three hundred eleven thousand, twenty-three".