11111101010011 has 4 divisors (see below), whose sum is σ = 11111107771192. Its totient is φ = 11111094248832.

The previous prime is 11111101009993. The next prime is 11111101010081. The reversal of 11111101010011 is 11001010111111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11111101010011 - 2⁵ = 11111101009979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11111101010011.

It is not an unprimeable number, because it can be changed into a prime (11111101010081) 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, 845371 + ... + 4789243.

It is an arithmetic number, because the mean of its divisors is an integer number (2777776942798).

Almost surely, 2^{11111101010011} is an apocalyptic number.

11111101010011 is a deficient number, since it is larger than the sum of its proper divisors (6761181).

11111101010011 is an equidigital number, since it uses as much as digits as its factorization.

11111101010011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6761180.

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

Adding to 11111101010011 its reverse (11001010111111), we get a palindrome (22112111121122).

The spelling of 11111101010011 in words is "eleven trillion, one hundred eleven billion, one hundred one million, ten thousand, eleven".