1313231211 has 20 divisors (see below), whose sum is σ = 1964556000. Its totient is φ = 874231056.

The previous prime is 1313231177. The next prime is 1313231233. The reversal of 1313231211 is 1121323131.

1313231211 is a `hidden beast` number, since 131 + 323 + 1 + 211 = 666.

It is not a de Polignac number, because 1313231211 - 2¹¹ = 1313229163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1313231261) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 46965 + ... + 69513.

It is an arithmetic number, because the mean of its divisors is an integer number (98227800).

Almost surely, 2^1313231211 is an apocalyptic number.

1313231211 is a deficient number, since it is larger than the sum of its proper divisors (651324789).

1313231211 is an equidigital number, since it uses as much as digits as its factorization.

1313231211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23280 (or 23271 counting only the distinct ones).

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

The square root of 1313231211 is about 36238.5321308687. The cubic root of 1313231211 is about 1095.0830711982.

Adding to 1313231211 its reverse (1121323131), we get a palindrome (2434554342).

The spelling of 1313231211 in words is "one billion, three hundred thirteen million, two hundred thirty-one thousand, two hundred eleven".