1115321306081 has 2 divisors, whose sum is σ = 1115321306082. Its totient is φ = 1115321306080.

The previous prime is 1115321306059. The next prime is 1115321306131. The reversal of 1115321306081 is 1806031235111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 605073958225 + 510247347856 = 777865^2 + 714316^2 .

It is a cyclic number.

It is not a de Polignac number, because 1115321306081 - 2¹⁰ = 1115321305057 is a prime.

It is a super-2 number, since 2×1115321306081² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1115321306041) 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, 557660653040 + 557660653041.

It is an arithmetic number, because the mean of its divisors is an integer number (557660653041).

Almost surely, 2^{1115321306081} is an apocalyptic number.

It is an amenable number.

1115321306081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115321306081 is an equidigital number, since it uses as much as digits as its factorization.

1115321306081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 32.

The spelling of 1115321306081 in words is "one trillion, one hundred fifteen billion, three hundred twenty-one million, three hundred six thousand, eighty-one".