1323131212 has 96 divisors (see below), whose sum is σ = 2716729344. Its totient is φ = 558835200.

The previous prime is 1323131207. The next prime is 1323131237. The reversal of 1323131212 is 2121313231.

It is a self number, because there is not a number n which added to its sum of digits gives 1323131212.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4708512 + ... + 4708792.

It is an arithmetic number, because the mean of its divisors is an integer number (28299264).

Almost surely, 2^1323131212 is an apocalyptic number.

It is an amenable number.

1323131212 is an abundant number, since it is smaller than the sum of its proper divisors (1393598132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1323131212 is a wasteful number, since it uses less digits than its factorization.

1323131212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479 (or 477 counting only the distinct ones).

The product of its digits is 216, while the sum is 19.

The square root of 1323131212 is about 36374.8706114537. The cubic root of 1323131212 is about 1097.8280039327.

Adding to 1323131212 its reverse (2121313231), we get a palindrome (3444444443).

The spelling of 1323131212 in words is "one billion, three hundred twenty-three million, one hundred thirty-one thousand, two hundred twelve".