1321130113187 has 2 divisors, whose sum is σ = 1321130113188. Its totient is φ = 1321130113186.

The previous prime is 1321130113181. The next prime is 1321130113243. The reversal of 1321130113187 is 7813110311231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321130113187 - 2¹⁰ = 1321130112163 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321130113181) 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, 660565056593 + 660565056594.

It is an arithmetic number, because the mean of its divisors is an integer number (660565056594).

Almost surely, 2^{1321130113187} is an apocalyptic number.

1321130113187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321130113187 is an equidigital number, since it uses as much as digits as its factorization.

1321130113187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 32.

The spelling of 1321130113187 in words is "one trillion, three hundred twenty-one billion, one hundred thirty million, one hundred thirteen thousand, one hundred eighty-seven".