1310321100203 has 4 divisors (see below), whose sum is σ = 1310341137480. Its totient is φ = 1310301062928.

The previous prime is 1310321100167. The next prime is 1310321100217. The reversal of 1310321100203 is 3020011230131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1310321100203 - 2²⁰ = 1310320051627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1310321106203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9920225 + ... + 10051442.

It is an arithmetic number, because the mean of its divisors is an integer number (327585284370).

Almost surely, 2^{1310321100203} is an apocalyptic number.

1310321100203 is a deficient number, since it is larger than the sum of its proper divisors (20037277).

1310321100203 is an equidigital number, since it uses as much as digits as its factorization.

1310321100203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20037276.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 1310321100203 its reverse (3020011230131), we get a palindrome (4330332330334).

The spelling of 1310321100203 in words is "one trillion, three hundred ten billion, three hundred twenty-one million, one hundred thousand, two hundred three".