1323021201321 has 16 divisors (see below), whose sum is σ = 1853967790080. Its totient is φ = 837596150160.

The previous prime is 1323021201319. The next prime is 1323021201329. The reversal of 1323021201321 is 1231021203231.

It is not a de Polignac number, because 1323021201321 - 2¹ = 1323021201319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1323021201329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68962425 + ... + 68981606.

It is an arithmetic number, because the mean of its divisors is an integer number (115872986880).

Almost surely, 2^{1323021201321} is an apocalyptic number.

It is an amenable number.

1323021201321 is a deficient number, since it is larger than the sum of its proper divisors (530946588759).

1323021201321 is a wasteful number, since it uses less digits than its factorization.

1323021201321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137944196.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1323021201321 its reverse (1231021203231), we get a palindrome (2554042404552).

The spelling of 1323021201321 in words is "one trillion, three hundred twenty-three billion, twenty-one million, two hundred one thousand, three hundred twenty-one".