1331215013 has 2 divisors, whose sum is σ = 1331215014. Its totient is φ = 1331215012.

The previous prime is 1331215007. The next prime is 1331215033. The reversal of 1331215013 is 3105121331.

It is an a-pointer prime, because the next prime (1331215033) can be obtained adding 1331215013 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1223740324 + 107474689 = 34982^2 + 10367^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331215013 - 2⁸ = 1331214757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331215003) 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 as a sum of consecutive naturals, namely, 665607506 + 665607507.

It is an arithmetic number, because the mean of its divisors is an integer number (665607507).

Almost surely, 2^1331215013 is an apocalyptic number.

It is an amenable number.

1331215013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331215013 is an equidigital number, since it uses as much as digits as its factorization.

1331215013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 1331215013 is about 36485.8193412180. The cubic root of 1331215013 is about 1100.0592290422.

Adding to 1331215013 its reverse (3105121331), we get a palindrome (4436336344).

The spelling of 1331215013 in words is "one billion, three hundred thirty-one million, two hundred fifteen thousand, thirteen".