11221011111 has 8 divisors (see below), whose sum is σ = 15214930560. Its totient is φ = 7353882872.

The previous prime is 11221011103. The next prime is 11221011163. The reversal of 11221011111 is 11111012211.

11221011111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11221011111 - 2³ = 11221011103 is a prime.

It is a super-2 number, since 2×11221011111² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221011911) 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 7 ways as a sum of consecutive naturals, for example, 31697595 + ... + 31697948.

It is an arithmetic number, because the mean of its divisors is an integer number (1901866320).

Almost surely, 2^11221011111 is an apocalyptic number.

11221011111 is a deficient number, since it is larger than the sum of its proper divisors (3993919449).

11221011111 is an equidigital number, since it uses as much as digits as its factorization.

11221011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63395605.

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

Adding to 11221011111 its reverse (11111012211), we get a palindrome (22332023322).

It can be divided in two parts, 112210 and 11111, that added together give a palindrome (123321).

The spelling of 11221011111 in words is "eleven billion, two hundred twenty-one million, eleven thousand, one hundred eleven".