1311218043 has 16 divisors (see below), whose sum is σ = 1792179360. Its totient is φ = 852470784.

The previous prime is 1311218033. The next prime is 1311218081. The reversal of 1311218043 is 3408121131.

It is not a de Polignac number, because 1311218043 - 2⁶ = 1311217979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1311218023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14146 + ... + 53127.

It is an arithmetic number, because the mean of its divisors is an integer number (112011210).

Almost surely, 2^1311218043 is an apocalyptic number.

1311218043 is a deficient number, since it is larger than the sum of its proper divisors (480961317).

1311218043 is an equidigital number, since it uses as much as digits as its factorization.

1311218043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67438.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1311218043 is about 36210.7448556364. The cubic root of 1311218043 is about 1094.5232018538.

Adding to 1311218043 its reverse (3408121131), we get a palindrome (4719339174).

The spelling of 1311218043 in words is "one billion, three hundred eleven million, two hundred eighteen thousand, forty-three".