11220111201211 has 16 divisors (see below), whose sum is σ = 12343763865600. Its totient is φ = 10113826877280.

The previous prime is 11220111201149. The next prime is 11220111201227. The reversal of 11220111201211 is 11210211102211.

It is a cyclic number.

It is not a de Polignac number, because 11220111201211 - 2¹³ = 11220111193019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11220111201241) 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, 9885 + ... + 4737121.

It is an arithmetic number, because the mean of its divisors is an integer number (771485241600).

Almost surely, 2^{11220111201211} is an apocalyptic number.

11220111201211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11220111201211 is a deficient number, since it is larger than the sum of its proper divisors (1123652664389).

11220111201211 is a wasteful number, since it uses less digits than its factorization.

11220111201211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4729074.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 11220111201211 its reverse (11210211102211), we get a palindrome (22430322303422).

The spelling of 11220111201211 in words is "eleven trillion, two hundred twenty billion, one hundred eleven million, two hundred one thousand, two hundred eleven".