1320221323241 has 4 divisors (see below), whose sum is σ = 1320263484372. Its totient is φ = 1320179162112.

The previous prime is 1320221323207. The next prime is 1320221323243. The reversal of 1320221323241 is 1423231220231.

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

It can be written as a sum of positive squares in 2 ways, for example, as 558958093225 + 761263230016 = 747635^2 + 872504^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320221323241 - 2²⁶ = 1320154214377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1320221323241.

It is not an unprimeable number, because it can be changed into a prime (1320221323243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21033560 + ... + 21096233.

It is an arithmetic number, because the mean of its divisors is an integer number (330065871093).

Almost surely, 2^{1320221323241} is an apocalyptic number.

It is an amenable number.

1320221323241 is a deficient number, since it is larger than the sum of its proper divisors (42161131).

1320221323241 is an equidigital number, since it uses as much as digits as its factorization.

1320221323241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42161130.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 1320221323241 its reverse (1423231220231), we get a palindrome (2743452543472).

The spelling of 1320221323241 in words is "one trillion, three hundred twenty billion, two hundred twenty-one million, three hundred twenty-three thousand, two hundred forty-one".