1311301302203 has 4 divisors (see below), whose sum is σ = 1341796681368. Its totient is φ = 1280805923040.

The previous prime is 1311301302193. The next prime is 1311301302263. The reversal of 1311301302203 is 3022031031131.

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 1311301302203 - 2³⁴ = 1294121433019 is a prime.

It is a super-2 number, since 2×1311301302203² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311301302263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15247689518 + ... + 15247689603.

It is an arithmetic number, because the mean of its divisors is an integer number (335449170342).

Almost surely, 2^{1311301302203} is an apocalyptic number.

1311301302203 is a deficient number, since it is larger than the sum of its proper divisors (30495379165).

1311301302203 is an equidigital number, since it uses as much as digits as its factorization.

1311301302203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30495379164.

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

Adding to 1311301302203 its reverse (3022031031131), we get a palindrome (4333332333334).

The spelling of 1311301302203 in words is "one trillion, three hundred eleven billion, three hundred one million, three hundred two thousand, two hundred three".