1311203119 has 4 divisors (see below), whose sum is σ = 1311275944. Its totient is φ = 1311130296.

The previous prime is 1311203111. The next prime is 1311203137. The reversal of 1311203119 is 9113021131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1311203119 - 2³ = 1311203111 is a prime.

It is a super-2 number, since 2×1311203119² = 3438507238550656322, which contains 22 as substring.

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 1311203119.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311203111) 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, 12469 + ... + 52705.

It is an arithmetic number, because the mean of its divisors is an integer number (327818986).

Almost surely, 2^1311203119 is an apocalyptic number.

1311203119 is a deficient number, since it is larger than the sum of its proper divisors (72825).

1311203119 is an equidigital number, since it uses as much as digits as its factorization.

1311203119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72824.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 1311203119 is about 36210.5387836193. The cubic root of 1311203119 is about 1094.5190492959.

The spelling of 1311203119 in words is "one billion, three hundred eleven million, two hundred three thousand, one hundred nineteen".