1311401213 has 2 divisors, whose sum is σ = 1311401214. Its totient is φ = 1311401212.

The previous prime is 1311401209. The next prime is 1311401219. The reversal of 1311401213 is 3121041131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 800776804 + 510624409 = 28298^2 + 22597^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311401213 - 2² = 1311401209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1311401191 and 1311401200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311401219) 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, 655700606 + 655700607.

It is an arithmetic number, because the mean of its divisors is an integer number (655700607).

Almost surely, 2^1311401213 is an apocalyptic number.

It is an amenable number.

1311401213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311401213 is an equidigital number, since it uses as much as digits as its factorization.

1311401213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1311401213 is about 36213.2739889671. The cubic root of 1311401213 is about 1094.5741657854.

Adding to 1311401213 its reverse (3121041131), we get a palindrome (4432442344).

The spelling of 1311401213 in words is "one billion, three hundred eleven million, four hundred one thousand, two hundred thirteen".