1131320521187 has 2 divisors, whose sum is σ = 1131320521188. Its totient is φ = 1131320521186.

The previous prime is 1131320521153. The next prime is 1131320521231. The reversal of 1131320521187 is 7811250231311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1131320521187 - 2⁸ = 1131320520931 is a prime.

It is a super-2 number, since 2×1131320521187² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1131320521127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565660260593 + 565660260594.

It is an arithmetic number, because the mean of its divisors is an integer number (565660260594).

Almost surely, 2^{1131320521187} is an apocalyptic number.

1131320521187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131320521187 is an equidigital number, since it uses as much as digits as its factorization.

1131320521187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 35.

Adding to 1131320521187 its reverse (7811250231311), we get a palindrome (8942570752498).

The spelling of 1131320521187 in words is "one trillion, one hundred thirty-one billion, three hundred twenty million, five hundred twenty-one thousand, one hundred eighty-seven".