1100100001181 has 2 divisors, whose sum is σ = 1100100001182. Its totient is φ = 1100100001180.

The previous prime is 1100100001177. The next prime is 1100100001271. The reversal of 1100100001181 is 1811000010011.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1073233840900 + 26866160281 = 1035970^2 + 163909^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100100001181 - 2² = 1100100001177 is a prime.

It is a super-2 number, since 2×1100100001181² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1100100001081) 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, 550050000590 + 550050000591.

It is an arithmetic number, because the mean of its divisors is an integer number (550050000591).

Almost surely, 2^{1100100001181} is an apocalyptic number.

It is an amenable number.

1100100001181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100100001181 is an equidigital number, since it uses as much as digits as its factorization.

1100100001181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1100100001181 its reverse (1811000010011), we get a palindrome (2911100011192).

The spelling of 1100100001181 in words is "one trillion, one hundred billion, one hundred million, one thousand, one hundred eighty-one".