11001122111111 has 4 divisors (see below), whose sum is σ = 12001224121224. Its totient is φ = 10001020101000.

The previous prime is 11001122111101. The next prime is 11001122111113. The reversal of 11001122111111 is 11111122110011.

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 11001122111111 - 2⁶ = 11001122111047 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001122111113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500051005040 + ... + 500051005061.

It is an arithmetic number, because the mean of its divisors is an integer number (3000306030306).

Almost surely, 2^{11001122111111} is an apocalyptic number.

11001122111111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11001122111111 is a deficient number, since it is larger than the sum of its proper divisors (1000102010113).

11001122111111 is a wasteful number, since it uses less digits than its factorization.

11001122111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000102010112.

The product of its (nonzero) digits is 4, while the sum is 14.

Adding to 11001122111111 its reverse (11111122110011), we get a palindrome (22112244221122).

It can be divided in two parts, 1100 and 1122111111, that added together give a palindrome (1122112211).

The spelling of 11001122111111 in words is "eleven trillion, one billion, one hundred twenty-two million, one hundred eleven thousand, one hundred eleven".