1311208492481 has 16 divisors (see below), whose sum is σ = 1339428908160. Its totient is φ = 1283120192640.

The previous prime is 1311208492411. The next prime is 1311208492487. The reversal of 1311208492481 is 1842948021131.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1311208492481 - 2¹⁰ = 1311208491457 is a prime.

It is a super-2 number, since 2×1311208492481² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311208492487) 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 15 ways as a sum of consecutive naturals, for example, 45865850 + ... + 45894428.

It is an arithmetic number, because the mean of its divisors is an integer number (83714306760).

Almost surely, 2^{1311208492481} is an apocalyptic number.

It is an amenable number.

1311208492481 is a deficient number, since it is larger than the sum of its proper divisors (28220415679).

1311208492481 is a wasteful number, since it uses less digits than its factorization.

1311208492481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30856.

The product of its (nonzero) digits is 110592, while the sum is 44.

The spelling of 1311208492481 in words is "one trillion, three hundred eleven billion, two hundred eight million, four hundred ninety-two thousand, four hundred eighty-one".