11111101100101 has 2 divisors, whose sum is σ = 11111101100102. Its totient is φ = 11111101100100.

The previous prime is 11111101100093. The next prime is 11111101100107. The reversal of 11111101100101 is 10100110111111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7580253407076 + 3530847693025 = 2753226^2 + 1879055^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111101100101 - 2³ = 11111101100093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111101100107) 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, 5555550550050 + 5555550550051.

It is an arithmetic number, because the mean of its divisors is an integer number (5555550550051).

Almost surely, 2^{11111101100101} is an apocalyptic number.

It is an amenable number.

11111101100101 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111101100101 is an equidigital number, since it uses as much as digits as its factorization.

11111101100101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1, while the sum is 10.

Adding to 11111101100101 its reverse (10100110111111), we get a palindrome (21211211211212).

The spelling of 11111101100101 in words is "eleven trillion, one hundred eleven billion, one hundred one million, one hundred thousand, one hundred one".