1323131213 has 8 divisors (see below), whose sum is σ = 1360415616. Its totient is φ = 1286085600.

The previous prime is 1323131207. The next prime is 1323131237. The reversal of 1323131213 is 3121313231.

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 1323131213 - 2⁴ = 1323131197 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 (1323131713) 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, 48431 + ... + 70652.

It is an arithmetic number, because the mean of its divisors is an integer number (170051952).

Almost surely, 2^1323131213 is an apocalyptic number.

It is an amenable number.

1323131213 is a deficient number, since it is larger than the sum of its proper divisors (37284403).

1323131213 is a wasteful number, since it uses less digits than its factorization.

1323131213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119395.

The product of its digits is 324, while the sum is 20.

The square root of 1323131213 is about 36374.8706251995. The cubic root of 1323131213 is about 1097.8280042093.

Adding to 1323131213 its reverse (3121313231), we get a palindrome (4444444444).

It can be divided in two parts, 13231 and 31213, that added together give a palindrome (44444).

The spelling of 1323131213 in words is "one billion, three hundred twenty-three million, one hundred thirty-one thousand, two hundred thirteen".