1323212121330 has 128 divisors (see below), whose sum is σ = 3539293802496. Its totient is φ = 313849536000.

The previous prime is 1323212121323. The next prime is 1323212121337. The reversal of 1323212121330 is 331212123231.

It is an interprime number because it is at equal distance from previous prime (1323212121323) and next prime (1323212121337).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1323212121330.

It is not an unprimeable number, because it can be changed into a prime (1323212121337) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 53233405 + ... + 53258255.

It is an arithmetic number, because the mean of its divisors is an integer number (27650732832).

Almost surely, 2^{1323212121330} is an apocalyptic number.

1323212121330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1323212121330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1769646901248).

1323212121330 is an abundant number, since it is smaller than the sum of its proper divisors (2216081681166).

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

1323212121330 is a wasteful number, since it uses less digits than its factorization.

1323212121330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28352.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 1323212121330 its reverse (331212123231), we get a palindrome (1654424244561).

The spelling of 1323212121330 in words is "one trillion, three hundred twenty-three billion, two hundred twelve million, one hundred twenty-one thousand, three hundred thirty".