1323331021221 has 16 divisors (see below), whose sum is σ = 1925138456640. Its totient is φ = 801896577920.

The previous prime is 1323331021217. The next prime is 1323331021241. The reversal of 1323331021221 is 1221201333231.

It is a cyclic number.

It is not a de Polignac number, because 1323331021221 - 2² = 1323331021217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1323331021191 and 1323331021200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323331021241) 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, 2835510 + ... + 3269063.

It is an arithmetic number, because the mean of its divisors is an integer number (120321153540).

Almost surely, 2^{1323331021221} is an apocalyptic number.

1323331021221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1323331021221 is a deficient number, since it is larger than the sum of its proper divisors (601807435419).

1323331021221 is a wasteful number, since it uses less digits than its factorization.

1323331021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6111156.

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

Adding to 1323331021221 its reverse (1221201333231), we get a palindrome (2544532354452).

The spelling of 1323331021221 in words is "one trillion, three hundred twenty-three billion, three hundred thirty-one million, twenty-one thousand, two hundred twenty-one".