1311434202165 has 16 divisors (see below), whose sum is σ = 2189524929408. Its totient is φ = 669021505856.

The previous prime is 1311434202163. The next prime is 1311434202227. The reversal of 1311434202165 is 5612024341131.

It is a cyclic number.

It is not a de Polignac number, because 1311434202165 - 2¹ = 1311434202163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311434202163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1900628934 + ... + 1900629623.

It is an arithmetic number, because the mean of its divisors is an integer number (136845308088).

Almost surely, 2^{1311434202165} is an apocalyptic number.

1311434202165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1311434202165 is a deficient number, since it is larger than the sum of its proper divisors (878090727243).

1311434202165 is a wasteful number, since it uses less digits than its factorization.

1311434202165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3801258588.

The product of its (nonzero) digits is 17280, while the sum is 33.

Adding to 1311434202165 its reverse (5612024341131), we get a palindrome (6923458543296).

The spelling of 1311434202165 in words is "one trillion, three hundred eleven billion, four hundred thirty-four million, two hundred two thousand, one hundred sixty-five".