1311056530403 has 4 divisors (see below), whose sum is σ = 1313726707128. Its totient is φ = 1308386353680.

The previous prime is 1311056530369. The next prime is 1311056530411. The reversal of 1311056530403 is 3040356501131.

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 1311056530403 - 2¹⁶ = 1311056464867 is a prime.

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 1311056530403.

It is not an unprimeable number, because it can be changed into a prime (1311056530423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1335087626 + ... + 1335088607.

It is an arithmetic number, because the mean of its divisors is an integer number (328431676782).

Almost surely, 2^{1311056530403} is an apocalyptic number.

1311056530403 is a deficient number, since it is larger than the sum of its proper divisors (2670176725).

1311056530403 is an equidigital number, since it uses as much as digits as its factorization.

1311056530403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2670176724.

The product of its (nonzero) digits is 16200, while the sum is 32.

The spelling of 1311056530403 in words is "one trillion, three hundred eleven billion, fifty-six million, five hundred thirty thousand, four hundred three".