1311230311 has 8 divisors (see below), whose sum is σ = 1320278400. Its totient is φ = 1302201720.

The previous prime is 1311230269. The next prime is 1311230317. The reversal of 1311230311 is 1130321131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1311230311 - 2¹³ = 1311222119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311230317) 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 7 ways as a sum of consecutive naturals, for example, 145816 + ... + 154546.

It is an arithmetic number, because the mean of its divisors is an integer number (165034800).

Almost surely, 2^1311230311 is an apocalyptic number.

1311230311 is a deficient number, since it is larger than the sum of its proper divisors (9048089).

1311230311 is an equidigital number, since it uses as much as digits as its factorization.

1311230311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9749.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1311230311 is about 36210.9142524737. The cubic root of 1311230311 is about 1094.5266153640.

Adding to 1311230311 its reverse (1130321131), we get a palindrome (2441551442).

The spelling of 1311230311 in words is "one billion, three hundred eleven million, two hundred thirty thousand, three hundred eleven".