1131321321287 has 2 divisors, whose sum is σ = 1131321321288. Its totient is φ = 1131321321286.

The previous prime is 1131321321217. The next prime is 1131321321349. The reversal of 1131321321287 is 7821231231311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1131321321287 - 2¹⁶ = 1131321255751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131321321217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565660660643 + 565660660644.

It is an arithmetic number, because the mean of its divisors is an integer number (565660660644).

Almost surely, 2^{1131321321287} is an apocalyptic number.

1131321321287 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131321321287 is an equidigital number, since it uses as much as digits as its factorization.

1131321321287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 35.

Adding to 1131321321287 its reverse (7821231231311), we get a palindrome (8952552552598).

The spelling of 1131321321287 in words is "one trillion, one hundred thirty-one billion, three hundred twenty-one million, three hundred twenty-one thousand, two hundred eighty-seven".