1311616105321 has 4 divisors (see below), whose sum is σ = 1311643411200. Its totient is φ = 1311588799444.

The previous prime is 1311616105307. The next prime is 1311616105337. The reversal of 1311616105321 is 1235016161131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1311616105321 - 2³⁹ = 761860291433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311616105391) 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, 13580761 + ... + 13676998.

It is an arithmetic number, because the mean of its divisors is an integer number (327910852800).

Almost surely, 2^{1311616105321} is an apocalyptic number.

It is an amenable number.

1311616105321 is a deficient number, since it is larger than the sum of its proper divisors (27305879).

1311616105321 is an equidigital number, since it uses as much as digits as its factorization.

1311616105321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27305878.

The product of its (nonzero) digits is 3240, while the sum is 31.

The spelling of 1311616105321 in words is "one trillion, three hundred eleven billion, six hundred sixteen million, one hundred five thousand, three hundred twenty-one".