1321031312003 has 8 divisors (see below), whose sum is σ = 1423237740288. Its totient is φ = 1218908974464.

The previous prime is 1321031311973. The next prime is 1321031312077. The reversal of 1321031312003 is 3002131301231.

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-1321031312003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321031312093) 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, 20990051 + ... + 21052892.

It is an arithmetic number, because the mean of its divisors is an integer number (177904717536).

Almost surely, 2^{1321031312003} is an apocalyptic number.

1321031312003 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1321031312003 is a deficient number, since it is larger than the sum of its proper divisors (102206428285).

1321031312003 is a wasteful number, since it uses less digits than its factorization.

1321031312003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42045373.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 1321031312003 its reverse (3002131301231), we get a palindrome (4323162613234).

The spelling of 1321031312003 in words is "one trillion, three hundred twenty-one billion, thirty-one million, three hundred twelve thousand, three".