11111001000011 has 4 divisors (see below), whose sum is σ = 12121092000024. Its totient is φ = 10100910000000.

The previous prime is 11111000999957. The next prime is 11111001000083. The reversal of 11111001000011 is 11000010011111.

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

It is a cyclic number.

It is not a de Polignac number, because 11111001000011 - 2³⁸ = 10836123093067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11111001000611) 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, 505045499990 + ... + 505045500011.

It is an arithmetic number, because the mean of its divisors is an integer number (3030273000006).

Almost surely, 2^{11111001000011} is an apocalyptic number.

11111001000011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11111001000011 is a deficient number, since it is larger than the sum of its proper divisors (1010091000013).

11111001000011 is a wasteful number, since it uses less digits than its factorization.

11111001000011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010091000012.

The product of its (nonzero) digits is 1, while the sum is 8.

Adding to 11111001000011 its reverse (11000010011111), we get a palindrome (22111011011122).

The spelling of 11111001000011 in words is "eleven trillion, one hundred eleven billion, one million, eleven", and thus it is an aban number.