1311231307 has 2 divisors, whose sum is σ = 1311231308. Its totient is φ = 1311231306.

The previous prime is 1311231277. The next prime is 1311231323. The reversal of 1311231307 is 7031321131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1311231307 - 2¹¹ = 1311229259 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311231347) 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, 655615653 + 655615654.

It is an arithmetic number, because the mean of its divisors is an integer number (655615654).

Almost surely, 2^1311231307 is an apocalyptic number.

1311231307 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311231307 is an equidigital number, since it uses as much as digits as its factorization.

1311231307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 1311231307 is about 36210.9280052307. The cubic root of 1311231307 is about 1094.5268924952.

Adding to 1311231307 its reverse (7031321131), we get a palindrome (8342552438).

The spelling of 1311231307 in words is "one billion, three hundred eleven million, two hundred thirty-one thousand, three hundred seven".