1311223311 has 24 divisors (see below), whose sum is σ = 2021220864. Its totient is φ = 816238080.

The previous prime is 1311223289. The next prime is 1311223321. The reversal of 1311223311 is 1133221131.

1311223311 is a `hidden beast` number, since 1 + 311 + 22 + 331 + 1 = 666.

It is not a de Polignac number, because 1311223311 - 2¹⁴ = 1311206927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311223321) 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 23 ways as a sum of consecutive naturals, for example, 14310 + ... + 53171.

It is an arithmetic number, because the mean of its divisors is an integer number (84217536).

Almost surely, 2^1311223311 is an apocalyptic number.

1311223311 is a deficient number, since it is larger than the sum of its proper divisors (709997553).

1311223311 is a wasteful number, since it uses less digits than its factorization.

1311223311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67631 (or 67628 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 1311223311 is about 36210.8175964034. The cubic root of 1311223311 is about 1094.5246676513.

Adding to 1311223311 its reverse (1133221131), we get a palindrome (2444444442).

The spelling of 1311223311 in words is "one billion, three hundred eleven million, two hundred twenty-three thousand, three hundred eleven".