1311203013 has 16 divisors (see below), whose sum is σ = 1914943680. Its totient is φ = 794345216.

The previous prime is 1311203009. The next prime is 1311203017. The reversal of 1311203013 is 3103021131.

It is an interprime number because it is at equal distance from previous prime (1311203009) and next prime (1311203017).

It is a cyclic number.

It is not a de Polignac number, because 1311203013 - 2² = 1311203009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1311202983 and 1311203001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311203017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 441795 + ... + 444752.

It is an arithmetic number, because the mean of its divisors is an integer number (119683980).

Almost surely, 2^1311203013 is an apocalyptic number.

It is an amenable number.

1311203013 is a deficient number, since it is larger than the sum of its proper divisors (603740667).

1311203013 is a wasteful number, since it uses less digits than its factorization.

1311203013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886596.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 1311203013 is about 36210.5373199570. The cubic root of 1311203013 is about 1094.5190198016.

Adding to 1311203013 its reverse (3103021131), we get a palindrome (4414224144).

The spelling of 1311203013 in words is "one billion, three hundred eleven million, two hundred three thousand, thirteen".