1311103303 has 4 divisors (see below), whose sum is σ = 1380108760. Its totient is φ = 1242097848.

The previous prime is 1311103279. The next prime is 1311103327. The reversal of 1311103303 is 3033011131.

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

It is an interprime number because it is at equal distance from previous prime (1311103279) and next prime (1311103327).

It is a cyclic number.

It is not a de Polignac number, because 1311103303 - 2²⁵ = 1277548871 is a prime.

It is a super-3 number, since 3×1311103303³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311103333) 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, 34502700 + ... + 34502737.

It is an arithmetic number, because the mean of its divisors is an integer number (345027190).

Almost surely, 2^1311103303 is an apocalyptic number.

1311103303 is a deficient number, since it is larger than the sum of its proper divisors (69005457).

1311103303 is an equidigital number, since it uses as much as digits as its factorization.

1311103303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69005456.

The product of its (nonzero) digits is 81, while the sum is 16.

The square root of 1311103303 is about 36209.1604846067. The cubic root of 1311103303 is about 1094.4912749859.

Adding to 1311103303 its reverse (3033011131), we get a palindrome (4344114434).

The spelling of 1311103303 in words is "one billion, three hundred eleven million, one hundred three thousand, three hundred three".