11221220011 has 2 divisors, whose sum is σ = 11221220012. Its totient is φ = 11221220010.

The previous prime is 11221219987. The next prime is 11221220041. The reversal of 11221220011 is 11002212211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11221220011 - 2¹⁹ = 11220695723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11221219973 and 11221220000.

It is not a weakly prime, because it can be changed into another prime (11221220041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610610005 + 5610610006.

It is an arithmetic number, because the mean of its divisors is an integer number (5610610006).

Almost surely, 2^11221220011 is an apocalyptic number.

11221220011 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221220011 is an equidigital number, since it uses as much as digits as its factorization.

11221220011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11221220011 its reverse (11002212211), we get a palindrome (22223432222).

It can be divided in two parts, 112212200 and 11, that added together give a palindrome (112212211).

The spelling of 11221220011 in words is "eleven billion, two hundred twenty-one million, two hundred twenty thousand, eleven".