1311133203109 has 2 divisors, whose sum is σ = 1311133203110. Its totient is φ = 1311133203108.

The previous prime is 1311133203101. The next prime is 1311133203113. The reversal of 1311133203109 is 9013023311131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 874780478209 + 436352724900 = 935297^2 + 660570^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311133203109 - 2³ = 1311133203101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311133203101) 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 as a sum of consecutive naturals, namely, 655566601554 + 655566601555.

It is an arithmetic number, because the mean of its divisors is an integer number (655566601555).

Almost surely, 2^{1311133203109} is an apocalyptic number.

It is an amenable number.

1311133203109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311133203109 is an equidigital number, since it uses as much as digits as its factorization.

1311133203109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 28.

The spelling of 1311133203109 in words is "one trillion, three hundred eleven billion, one hundred thirty-three million, two hundred three thousand, one hundred nine".