1311034321 has 4 divisors (see below), whose sum is σ = 1313704944. Its totient is φ = 1308363700.

The previous prime is 1311034313. The next prime is 1311034331. The reversal of 1311034321 is 1234301131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1311034321 - 2³ = 1311034313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311034331) 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, 1334575 + ... + 1335556.

It is an arithmetic number, because the mean of its divisors is an integer number (328426236).

Almost surely, 2^1311034321 is an apocalyptic number.

It is an amenable number.

1311034321 is a deficient number, since it is larger than the sum of its proper divisors (2670623).

1311034321 is an equidigital number, since it uses as much as digits as its factorization.

1311034321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2670622.

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

The square root of 1311034321 is about 36208.2079230663. The cubic root of 1311034321 is about 1094.4720795696.

Adding to 1311034321 its reverse (1234301131), we get a palindrome (2545335452).

It can be divided in two parts, 131103 and 4321, that added together give a square (135424 = 368²).

The spelling of 1311034321 in words is "one billion, three hundred eleven million, thirty-four thousand, three hundred twenty-one".