11100100111081 has 2 divisors, whose sum is σ = 11100100111082. Its totient is φ = 11100100111080.

The previous prime is 11100100111073. The next prime is 11100100111117. The reversal of 11100100111081 is 18011100100111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8738527210000 + 2361572901081 = 2956100^2 + 1536741^2 .

It is a cyclic number.

It is not a de Polignac number, because 11100100111081 - 2³ = 11100100111073 is a prime.

It is a super-3 number, since 3×11100100111081³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (11100100117081) 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, 5550050055540 + 5550050055541.

It is an arithmetic number, because the mean of its divisors is an integer number (5550050055541).

Almost surely, 2^{11100100111081} is an apocalyptic number.

It is an amenable number.

11100100111081 is a deficient number, since it is larger than the sum of its proper divisors (1).

11100100111081 is an equidigital number, since it uses as much as digits as its factorization.

11100100111081 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 16.

Adding to 11100100111081 its reverse (18011100100111), we get a palindrome (29111200211192).

The spelling of 11100100111081 in words is "eleven trillion, one hundred billion, one hundred million, one hundred eleven thousand, eighty-one".