11111111100101 has 4 divisors (see below), whose sum is σ = 11117898585612. Its totient is φ = 11104323614592.

The previous prime is 11111111100071. The next prime is 11111111100163. The reversal of 11111111100101 is 10100111111111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 964178669476 + 10146932430625 = 981926^2 + 3185425^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111111100101 - 2²² = 11111106905797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111111109101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3393740300 + ... + 3393743573.

It is an arithmetic number, because the mean of its divisors is an integer number (2779474646403).

Almost surely, 2^{11111111100101} is an apocalyptic number.

It is an amenable number.

11111111100101 is a deficient number, since it is larger than the sum of its proper divisors (6787485511).

11111111100101 is an equidigital number, since it uses as much as digits as its factorization.

11111111100101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6787485510.

The product of its (nonzero) digits is 1, while the sum is 11.

Adding to 11111111100101 its reverse (10100111111111), we get a palindrome (21211222211212).

The spelling of 11111111100101 in words is "eleven trillion, one hundred eleven billion, one hundred eleven million, one hundred thousand, one hundred one".