1320331113209 has 2 divisors, whose sum is σ = 1320331113210. Its totient is φ = 1320331113208.

The previous prime is 1320331113163. The next prime is 1320331113247. The reversal of 1320331113209 is 9023111330231.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 991910426809 + 328420686400 = 995947^2 + 573080^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320331113209 - 2⁸ = 1320331112953 is a prime.

It is not a weakly prime, because it can be changed into another prime (1320331113109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660165556604 + 660165556605.

It is an arithmetic number, because the mean of its divisors is an integer number (660165556605).

Almost surely, 2^{1320331113209} is an apocalyptic number.

It is an amenable number.

1320331113209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320331113209 is an equidigital number, since it uses as much as digits as its factorization.

1320331113209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 29.

The spelling of 1320331113209 in words is "one trillion, three hundred twenty billion, three hundred thirty-one million, one hundred thirteen thousand, two hundred nine".