1323131211 has 24 divisors (see below), whose sum is σ = 1971107424. Its totient is φ = 854634240.

The previous prime is 1323131207. The next prime is 1323131237. The reversal of 1323131211 is 1121313231.

1323131211 is a `hidden beast` number, since 1 + 323 + 131 + 211 = 666.

It is not a de Polignac number, because 1323131211 - 2² = 1323131207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1323131111) 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, 72010 + ... + 88496.

It is an arithmetic number, because the mean of its divisors is an integer number (82129476).

Almost surely, 2^1323131211 is an apocalyptic number.

1323131211 is a deficient number, since it is larger than the sum of its proper divisors (647976213).

1323131211 is a wasteful number, since it uses less digits than its factorization.

1323131211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16771 (or 16768 counting only the distinct ones).

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

The square root of 1323131211 is about 36374.8705977080. The cubic root of 1323131211 is about 1097.8280036561.

Adding to 1323131211 its reverse (1121313231), we get a palindrome (2444444442).

The spelling of 1323131211 in words is "one billion, three hundred twenty-three million, one hundred thirty-one thousand, two hundred eleven".