1311443321 has 8 divisors (see below), whose sum is σ = 1336848480. Its totient is φ = 1286239392.

The previous prime is 1311443311. The next prime is 1311443339. The reversal of 1311443321 is 1233441131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311443321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311443311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37115 + ... + 63248.

It is an arithmetic number, because the mean of its divisors is an integer number (167106060).

Almost surely, 2^1311443321 is an apocalyptic number.

It is an amenable number.

1311443321 is a deficient number, since it is larger than the sum of its proper divisors (25405159).

1311443321 is a wasteful number, since it uses less digits than its factorization.

1311443321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100615.

The product of its digits is 864, while the sum is 23.

The square root of 1311443321 is about 36213.8553733236. The cubic root of 1311443321 is about 1094.5858809481.

Adding to 1311443321 its reverse (1233441131), we get a palindrome (2544884452).

The spelling of 1311443321 in words is "one billion, three hundred eleven million, four hundred forty-three thousand, three hundred twenty-one".