11100111100081 has 2 divisors, whose sum is σ = 11100111100082. Its totient is φ = 11100111100080.

The previous prime is 11100111100051. The next prime is 11100111100103. The reversal of 11100111100081 is 18000111100111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10919323713600 + 180787386481 = 3304440^2 + 425191^2 .

It is a cyclic number.

It is not a de Polignac number, because 11100111100081 - 2⁵ = 11100111100049 is a prime.

It is a super-2 number, since 2×11100111100081² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11100111100051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550055550040 + 5550055550041.

It is an arithmetic number, because the mean of its divisors is an integer number (5550055550041).

Almost surely, 2^{11100111100081} is an apocalyptic number.

It is an amenable number.

11100111100081 is a deficient number, since it is larger than the sum of its proper divisors (1).

11100111100081 is an equidigital number, since it uses as much as digits as its factorization.

11100111100081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 11100111100081 its reverse (18000111100111), we get a palindrome (29100222200192).

The spelling of 11100111100081 in words is "eleven trillion, one hundred billion, one hundred eleven million, one hundred thousand, eighty-one".