11011221111 has 16 divisors (see below), whose sum is σ = 16532978688. Its totient is φ = 6458193600.

The previous prime is 11011221097. The next prime is 11011221131. The reversal of 11011221111 is 11112211011.

11011221111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11011221111 - 2¹⁸ = 11010958967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011221131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5380806 + ... + 5382851.

It is an arithmetic number, because the mean of its divisors is an integer number (1033311168).

Almost surely, 2^11011221111 is an apocalyptic number.

11011221111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11011221111 is a deficient number, since it is larger than the sum of its proper divisors (5521757577).

11011221111 is a wasteful number, since it uses less digits than its factorization.

11011221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10763702.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 11011221111 its reverse (11112211011), we get a palindrome (22123432122).

The spelling of 11011221111 in words is "eleven billion, eleven million, two hundred twenty-one thousand, one hundred eleven".