1158218333081 has 2 divisors, whose sum is σ = 1158218333082. Its totient is φ = 1158218333080.

The previous prime is 1158218333059. The next prime is 1158218333087. The reversal of 1158218333081 is 1803338128511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 954177312400 + 204041020681 = 976820^2 + 451709^2 .

It is an emirp because it is prime and its reverse (1803338128511) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1158218333081 is a prime.

It is a super-2 number, since 2×1158218333081² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1158218333087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 579109166540 + 579109166541.

It is an arithmetic number, because the mean of its divisors is an integer number (579109166541).

Almost surely, 2^{1158218333081} is an apocalyptic number.

It is an amenable number.

1158218333081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1158218333081 is an equidigital number, since it uses as much as digits as its factorization.

1158218333081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 44.

The spelling of 1158218333081 in words is "one trillion, one hundred fifty-eight billion, two hundred eighteen million, three hundred thirty-three thousand, eighty-one".