1320332112221 has 4 divisors (see below), whose sum is σ = 1326148553472. Its totient is φ = 1314515670972.

The previous prime is 1320332112217. The next prime is 1320332112227. The reversal of 1320332112221 is 1222112330231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1320332112221 - 2² = 1320332112217 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 (1320332112227) 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, 2908220285 + ... + 2908220738.

It is an arithmetic number, because the mean of its divisors is an integer number (331537138368).

Almost surely, 2^{1320332112221} is an apocalyptic number.

It is an amenable number.

1320332112221 is a deficient number, since it is larger than the sum of its proper divisors (5816441251).

1320332112221 is an equidigital number, since it uses as much as digits as its factorization.

1320332112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5816441250.

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

Adding to 1320332112221 its reverse (1222112330231), we get a palindrome (2542444442452).

The spelling of 1320332112221 in words is "one trillion, three hundred twenty billion, three hundred thirty-two million, one hundred twelve thousand, two hundred twenty-one".