1311102655105 has 4 divisors (see below), whose sum is σ = 1573323186132. Its totient is φ = 1048882124080.

The previous prime is 1311102655067. The next prime is 1311102655117. The reversal of 1311102655105 is 5015562011131.

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 380680362049 + 930422293056 = 616993^2 + 964584^2 .

It is not a de Polignac number, because 1311102655105 - 2⁷ = 1311102654977 is a prime.

It is a super-2 number, since 2×1311102655105² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131110265506 + ... + 131110265515.

It is an arithmetic number, because the mean of its divisors is an integer number (393330796533).

Almost surely, 2^{1311102655105} is an apocalyptic number.

It is an amenable number.

1311102655105 is a deficient number, since it is larger than the sum of its proper divisors (262220531027).

1311102655105 is an equidigital number, since it uses as much as digits as its factorization.

1311102655105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262220531026.

The product of its (nonzero) digits is 4500, while the sum is 31.

Adding to 1311102655105 its reverse (5015562011131), we get a palindrome (6326664666236).

It can be divided in two parts, 13111026 and 55105, that added together give a palindrome (13166131).

The spelling of 1311102655105 in words is "one trillion, three hundred eleven billion, one hundred two million, six hundred fifty-five thousand, one hundred five".