1321320223321 has 8 divisors (see below), whose sum is σ = 1532618767040. Its totient is φ = 1115656307568.

The previous prime is 1321320223277. The next prime is 1321320223339. The reversal of 1321320223321 is 1233220231231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321320223321 - 2⁹ = 1321320222809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321320223351) 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 7 ways as a sum of consecutive naturals, for example, 1408656486 + ... + 1408657423.

It is an arithmetic number, because the mean of its divisors is an integer number (191577345880).

Almost surely, 2^{1321320223321} is an apocalyptic number.

It is an amenable number.

1321320223321 is a deficient number, since it is larger than the sum of its proper divisors (211298543719).

1321320223321 is an equidigital number, since it uses as much as digits as its factorization.

1321320223321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2817313983.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 1321320223321 its reverse (1233220231231), we get a palindrome (2554540454552).

The spelling of 1321320223321 in words is "one trillion, three hundred twenty-one billion, three hundred twenty million, two hundred twenty-three thousand, three hundred twenty-one".