1320321213109 has 4 divisors (see below), whose sum is σ = 1320385243104. Its totient is φ = 1320257183116.

The previous prime is 1320321213103. The next prime is 1320321213161. The reversal of 1320321213109 is 9013121230231.

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 1320321213109 - 2³⁹ = 770565399221 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 (1320321213103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31984057 + ... + 32025310.

It is an arithmetic number, because the mean of its divisors is an integer number (330096310776).

Almost surely, 2^{1320321213109} is an apocalyptic number.

It is an amenable number.

1320321213109 is a deficient number, since it is larger than the sum of its proper divisors (64029995).

1320321213109 is an equidigital number, since it uses as much as digits as its factorization.

1320321213109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64029994.

The product of its (nonzero) digits is 1944, while the sum is 28.

The spelling of 1320321213109 in words is "one trillion, three hundred twenty billion, three hundred twenty-one million, two hundred thirteen thousand, one hundred nine".