1323020221331 has 4 divisors (see below), whose sum is σ = 1323112490064. Its totient is φ = 1322927952600.

The previous prime is 1323020221321. The next prime is 1323020221349. The reversal of 1323020221331 is 1331220203231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1323020221331 is a prime.

It is a super-2 number, since 2×1323020221331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1323020221297 and 1323020221306.

It is not an unprimeable number, because it can be changed into a prime (1323020221301) 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 3 ways as a sum of consecutive naturals, for example, 46112855 + ... + 46141536.

It is an arithmetic number, because the mean of its divisors is an integer number (330778122516).

Almost surely, 2^{1323020221331} is an apocalyptic number.

1323020221331 is a deficient number, since it is larger than the sum of its proper divisors (92268733).

1323020221331 is an equidigital number, since it uses as much as digits as its factorization.

1323020221331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92268732.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 1323020221331 its reverse (1331220203231), we get a palindrome (2654240424562).

The spelling of 1323020221331 in words is "one trillion, three hundred twenty-three billion, twenty million, two hundred twenty-one thousand, three hundred thirty-one".