1323121228 has 48 divisors (see below), whose sum is σ = 2729218464. Its totient is φ = 553328640.

The previous prime is 1323121213. The next prime is 1323121229. The reversal of 1323121228 is 8221213231.

It is not an unprimeable number, because it can be changed into a prime (1323121229) 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 15 ways as a sum of consecutive naturals, for example, 177676 + ... + 184972.

It is an arithmetic number, because the mean of its divisors is an integer number (56858718).

Almost surely, 2^1323121228 is an apocalyptic number.

It is an amenable number.

1323121228 is an abundant number, since it is smaller than the sum of its proper divisors (1406097236).

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

1323121228 is a wasteful number, since it uses less digits than its factorization.

1323121228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7642 (or 7640 counting only the distinct ones).

The product of its digits is 1152, while the sum is 25.

The square root of 1323121228 is about 36374.7333735933. The cubic root of 1323121228 is about 1097.8252426187.

Adding to 1323121228 its reverse (8221213231), we get a palindrome (9544334459).

The spelling of 1323121228 in words is "one billion, three hundred twenty-three million, one hundred twenty-one thousand, two hundred twenty-eight".