1311440412331 has 4 divisors (see below), whose sum is σ = 1498789042672. Its totient is φ = 1124091781992.

The previous prime is 1311440412329. The next prime is 1311440412379. The reversal of 1311440412331 is 1332140441131.

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 1311440412331 - 2¹ = 1311440412329 is a prime.

It is a super-2 number, since 2×1311440412331² (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 1311440412331.

It is not an unprimeable number, because it can be changed into a prime (1311440416331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93674315160 + ... + 93674315173.

It is an arithmetic number, because the mean of its divisors is an integer number (374697260668).

Almost surely, 2^{1311440412331} is an apocalyptic number.

1311440412331 is a deficient number, since it is larger than the sum of its proper divisors (187348630341).

1311440412331 is an equidigital number, since it uses as much as digits as its factorization.

1311440412331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187348630340.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 1311440412331 its reverse (1332140441131), we get a palindrome (2643580853462).

The spelling of 1311440412331 in words is "one trillion, three hundred eleven billion, four hundred forty million, four hundred twelve thousand, three hundred thirty-one".