1323321214551 has 24 divisors (see below), whose sum is σ = 2123274017520. Its totient is φ = 730108253952.

The previous prime is 1323321214531. The next prime is 1323321214561. The reversal of 1323321214551 is 1554121233231.

It is a happy number.

It is not a de Polignac number, because 1323321214551 - 2¹⁵ = 1323321181783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323321214531) 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 23 ways as a sum of consecutive naturals, for example, 155205826 + ... + 155214351.

It is an arithmetic number, because the mean of its divisors is an integer number (88469750730).

Almost surely, 2^{1323321214551} is an apocalyptic number.

1323321214551 is a deficient number, since it is larger than the sum of its proper divisors (799952802969).

1323321214551 is a wasteful number, since it uses less digits than its factorization.

1323321214551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310420223 (or 310420216 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

Adding to 1323321214551 its reverse (1554121233231), we get a palindrome (2877442447782).

The spelling of 1323321214551 in words is "one trillion, three hundred twenty-three billion, three hundred twenty-one million, two hundred fourteen thousand, five hundred fifty-one".