1311213043 has 8 divisors (see below), whose sum is σ = 1586678112. Its totient is φ = 1057785216.

The previous prime is 1311213023. The next prime is 1311213053. The reversal of 1311213043 is 3403121131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1311213043 - 2²¹ = 1309115891 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 1311213043.

It is not an unprimeable number, because it can be changed into a prime (1311213023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5509180 + ... + 5509417.

It is an arithmetic number, because the mean of its divisors is an integer number (198334764).

Almost surely, 2^1311213043 is an apocalyptic number.

1311213043 is a deficient number, since it is larger than the sum of its proper divisors (275465069).

1311213043 is a wasteful number, since it uses less digits than its factorization.

1311213043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11018621.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1311213043 is about 36210.6758152896. The cubic root of 1311213043 is about 1094.5218106224.

Adding to 1311213043 its reverse (3403121131), we get a palindrome (4714334174).

The spelling of 1311213043 in words is "one billion, three hundred eleven million, two hundred thirteen thousand, forty-three".