1323131332220 has 24 divisors (see below), whose sum is σ = 2806086453408. Its totient is φ = 524012408000.

The previous prime is 1323131332217. The next prime is 1323131332247. The reversal of 1323131332220 is 222331313231.

It is a self number, because there is not a number n which added to its sum of digits gives 1323131332220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 327505736 + ... + 327509775.

It is an arithmetic number, because the mean of its divisors is an integer number (116920268892).

Almost surely, 2^{1323131332220} is an apocalyptic number.

1323131332220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1323131332220 is an abundant number, since it is smaller than the sum of its proper divisors (1482955121188).

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

1323131332220 is a wasteful number, since it uses less digits than its factorization.

1323131332220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655015621 (or 655015619 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 1323131332220 its reverse (222331313231), we get a palindrome (1545462645451).

The spelling of 1323131332220 in words is "one trillion, three hundred twenty-three billion, one hundred thirty-one million, three hundred thirty-two thousand, two hundred twenty".