13686344317121 has 6 divisors (see below), whose sum is σ = 15920849511810. Its totient is φ = 11731152271776.

The previous prime is 13686344317099. The next prime is 13686344317147. The reversal of 13686344317121 is 12171344368631.

It can be written as a sum of positive squares in only one way, i.e., 13138892307121 + 547452010000 = 3624761^2 + 739900^2 .

It is not a de Polignac number, because 13686344317121 - 2⁶ = 13686344317057 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 13686344317121.

It is not an unprimeable number, because it can be changed into a prime (13686344307121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 139656574616 + ... + 139656574713.

It is an arithmetic number, because the mean of its divisors is an integer number (2653474918635).

Almost surely, 2^{13686344317121} is an apocalyptic number.

It is an amenable number.

13686344317121 is a deficient number, since it is larger than the sum of its proper divisors (2234505194689).

13686344317121 is an equidigital number, since it uses as much as digits as its factorization.

13686344317121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279313149343 (or 279313149336 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 50.

The spelling of 13686344317121 in words is "thirteen trillion, six hundred eighty-six billion, three hundred forty-four million, three hundred seventeen thousand, one hundred twenty-one".