1331322323209 has 2 divisors, whose sum is σ = 1331322323210. Its totient is φ = 1331322323208.

The previous prime is 1331322323189. The next prime is 1331322323231. The reversal of 1331322323209 is 9023232231331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 707948911609 + 623373411600 = 841397^2 + 789540^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331322323209 - 2¹³ = 1331322315017 is a prime.

It is not a weakly prime, because it can be changed into another prime (1331322323239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665661161604 + 665661161605.

It is an arithmetic number, because the mean of its divisors is an integer number (665661161605).

Almost surely, 2^{1331322323209} is an apocalyptic number.

It is an amenable number.

1331322323209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331322323209 is an equidigital number, since it uses as much as digits as its factorization.

1331322323209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 34.

The spelling of 1331322323209 in words is "one trillion, three hundred thirty-one billion, three hundred twenty-two million, three hundred twenty-three thousand, two hundred nine".