1323212331321 has 32 divisors (see below), whose sum is σ = 2061160611840. Its totient is φ = 837346395600.

The previous prime is 1323212331257. The next prime is 1323212331379. The reversal of 1323212331321 is 1231332123231.

1323212331321 is a `hidden beast` number, since 1 + 3 + 2 + 3 + 2 + 1 + 2 + 331 + 321 = 666.

It is not a de Polignac number, because 1323212331321 - 2⁶ = 1323212331257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1323212331421) 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, 8051385 + ... + 8214086.

It is an arithmetic number, because the mean of its divisors is an integer number (64411269120).

Almost surely, 2^{1323212331321} is an apocalyptic number.

It is an amenable number.

1323212331321 is a deficient number, since it is larger than the sum of its proper divisors (737948280519).

1323212331321 is a wasteful number, since it uses less digits than its factorization.

1323212331321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16265634 (or 16265628 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

Adding to 1323212331321 its reverse (1231332123231), we get a palindrome (2554544454552).

It can be divided in two parts, 132321 and 2331321, that added together give a palindrome (2463642).

The spelling of 1323212331321 in words is "one trillion, three hundred twenty-three billion, two hundred twelve million, three hundred thirty-one thousand, three hundred twenty-one".