1321310003 has 8 divisors (see below), whose sum is σ = 1484816928. Its totient is φ = 1166641344.

The previous prime is 1321309991. The next prime is 1321310009. The reversal of 1321310003 is 3000131231.

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 1321310003 - 2⁴ = 1321309987 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 1321310003.

It is not an unprimeable number, because it can be changed into a prime (1321310009) 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, 2209250 + ... + 2209847.

It is an arithmetic number, because the mean of its divisors is an integer number (185602116).

Almost surely, 2^1321310003 is an apocalyptic number.

1321310003 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1321310003 is a deficient number, since it is larger than the sum of its proper divisors (163506925).

1321310003 is a wasteful number, since it uses less digits than its factorization.

1321310003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4419133.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 1321310003 is about 36349.8281013817. The cubic root of 1321310003 is about 1097.3240750041.

Adding to 1321310003 its reverse (3000131231), we get a palindrome (4321441234).

The spelling of 1321310003 in words is "one billion, three hundred twenty-one million, three hundred ten thousand, three".