1323121332 has 96 divisors (see below), whose sum is σ = 3498534144. Its totient is φ = 386380800.

The previous prime is 1323121321. The next prime is 1323121337. The reversal of 1323121332 is 2331213231.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1323121299 and 1323121308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323121337) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 233857 + ... + 239447.

It is an arithmetic number, because the mean of its divisors is an integer number (36443064).

Almost surely, 2^1323121332 is an apocalyptic number.

1323121332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1323121332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1749267072).

1323121332 is an abundant number, since it is smaller than the sum of its proper divisors (2175412812).

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

1323121332 is a wasteful number, since it uses less digits than its factorization.

1323121332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5689 (or 5687 counting only the distinct ones).

The product of its digits is 648, while the sum is 21.

The square root of 1323121332 is about 36374.7348031570. The cubic root of 1323121332 is about 1097.8252713824.

Adding to 1323121332 its reverse (2331213231), we get a palindrome (3654334563).

The spelling of 1323121332 in words is "one billion, three hundred twenty-three million, one hundred twenty-one thousand, three hundred thirty-two".