1320011343221 has 4 divisors (see below), whose sum is σ = 1320019418700. Its totient is φ = 1320003267744.

The previous prime is 1320011343067. The next prime is 1320011343271. The reversal of 1320011343221 is 1223431100231.

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 1118329515121 + 201681828100 = 1057511^2 + 449090^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320011343221 - 2²² = 1320007148917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320011343271) 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, 3787376 + ... + 4121193.

It is an arithmetic number, because the mean of its divisors is an integer number (330004854675).

Almost surely, 2^{1320011343221} is an apocalyptic number.

It is an amenable number.

1320011343221 is a deficient number, since it is larger than the sum of its proper divisors (8075479).

1320011343221 is an equidigital number, since it uses as much as digits as its factorization.

1320011343221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8075478.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1320011343221 its reverse (1223431100231), we get a palindrome (2543442443452).

The spelling of 1320011343221 in words is "one trillion, three hundred twenty billion, eleven million, three hundred forty-three thousand, two hundred twenty-one".