1311203314055 has 16 divisors (see below), whose sum is σ = 1578951771264. Its totient is φ = 1045291415040.

The previous prime is 1311203313989. The next prime is 1311203314067. The reversal of 1311203314055 is 5504133021131.

It is not a de Polignac number, because 1311203314055 - 2¹² = 1311203309959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20429615 + ... + 20493695.

It is an arithmetic number, because the mean of its divisors is an integer number (98684485704).

Almost surely, 2^{1311203314055} is an apocalyptic number.

1311203314055 is a deficient number, since it is larger than the sum of its proper divisors (267748457209).

1311203314055 is a wasteful number, since it uses less digits than its factorization.

1311203314055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78346.

The product of its (nonzero) digits is 5400, while the sum is 29.

Adding to 1311203314055 its reverse (5504133021131), we get a palindrome (6815336335186).

The spelling of 1311203314055 in words is "one trillion, three hundred eleven billion, two hundred three million, three hundred fourteen thousand, fifty-five".