1311321003 has 8 divisors (see below), whose sum is σ = 1748975616. Its totient is φ = 873940200.

The previous prime is 1311321001. The next prime is 1311321007. The reversal of 1311321003 is 3001231131.

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

It is not a de Polignac number, because 1311321003 - 2¹ = 1311321001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1311321001) 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, 57003 + ... + 76628.

It is an arithmetic number, because the mean of its divisors is an integer number (218621952).

Almost surely, 2^1311321003 is an apocalyptic number.

1311321003 is a deficient number, since it is larger than the sum of its proper divisors (437654613).

1311321003 is a wasteful number, since it uses less digits than its factorization.

1311321003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136905.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 1311321003 is about 36212.1665051955. The cubic root of 1311321003 is about 1094.5518493036.

Adding to 1311321003 its reverse (3001231131), we get a palindrome (4312552134).

The spelling of 1311321003 in words is "one billion, three hundred eleven million, three hundred twenty-one thousand, three".