11221100111 has 4 divisors (see below), whose sum is σ = 12084261672. Its totient is φ = 10357938552.

The previous prime is 11221100081. The next prime is 11221100141. The reversal of 11221100111 is 11100112211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11100112211 = 131 ⋅84733681.

It is an interprime number because it is at equal distance from previous prime (11221100081) and next prime (11221100141).

It is not a de Polignac number, because 11221100111 - 2²² = 11216905807 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 11221100092 and 11221100101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221100141) 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, 431580761 + ... + 431580786.

It is an arithmetic number, because the mean of its divisors is an integer number (3021065418).

Almost surely, 2^11221100111 is an apocalyptic number.

11221100111 is a deficient number, since it is larger than the sum of its proper divisors (863161561).

11221100111 is an equidigital number, since it uses as much as digits as its factorization.

11221100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863161560.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11221100111 its reverse (11100112211), we get a palindrome (22321212322).

The spelling of 11221100111 in words is "eleven billion, two hundred twenty-one million, one hundred thousand, one hundred eleven".