1311502314511 has 4 divisors (see below), whose sum is σ = 1312174537024. Its totient is φ = 1310830092000.

The previous prime is 1311502314509. The next prime is 1311502314527. The reversal of 1311502314511 is 1154132051131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1311502314511 - 2¹ = 1311502314509 is a prime.

It is a super-2 number, since 2×1311502314511² (a number of 25 digits) contains 22 as substring.

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 1311502314511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311502314581) by changing a digit.

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, 336108330 + ... + 336112231.

It is an arithmetic number, because the mean of its divisors is an integer number (328043634256).

Almost surely, 2^{1311502314511} is an apocalyptic number.

1311502314511 is a deficient number, since it is larger than the sum of its proper divisors (672222513).

1311502314511 is an equidigital number, since it uses as much as digits as its factorization.

1311502314511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672222512.

The product of its (nonzero) digits is 1800, while the sum is 28.

Adding to 1311502314511 its reverse (1154132051131), we get a palindrome (2465634365642).

The spelling of 1311502314511 in words is "one trillion, three hundred eleven billion, five hundred two million, three hundred fourteen thousand, five hundred eleven".