11220111122211 has 16 divisors (see below), whose sum is σ = 17345099320320. Its totient is φ = 7154853468840.

The previous prime is 11220111122197. The next prime is 11220111122219. The reversal of 11220111122211 is 11222111102211.

It is a happy number.

11220111122211 is a `hidden beast` number, since 1 + 1 + 220 + 111 + 122 + 211 = 666.

It is not a de Polignac number, because 11220111122211 - 2¹³ = 11220111114019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11220111122219) 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 15 ways as a sum of consecutive naturals, for example, 9033905275 + ... + 9033906516.

It is an arithmetic number, because the mean of its divisors is an integer number (1084068707520).

Almost surely, 2^{11220111122211} is an apocalyptic number.

11220111122211 is a deficient number, since it is larger than the sum of its proper divisors (6124988198109).

11220111122211 is a wasteful number, since it uses less digits than its factorization.

11220111122211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18067811823 (or 18067811817 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11220111122211 its reverse (11222111102211), we get a palindrome (22442222224422).

The spelling of 11220111122211 in words is "eleven trillion, two hundred twenty billion, one hundred eleven million, one hundred twenty-two thousand, two hundred eleven".