11221220221211 has 32 divisors (see below), whose sum is σ = 15067166854656. Its totient is φ = 8070718176000.

The previous prime is 11221220221199. The next prime is 11221220221217. The reversal of 11221220221211 is 11212202212211.

It is a cyclic number.

It is not a de Polignac number, because 11221220221211 - 2¹⁰ = 11221220220187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11221220221217) 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 in 31 ways as a sum of consecutive naturals, for example, 16606676 + ... + 17269166.

It is an arithmetic number, because the mean of its divisors is an integer number (470848964208).

Almost surely, 2^{11221220221211} is an apocalyptic number.

11221220221211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11221220221211 is a deficient number, since it is larger than the sum of its proper divisors (3845946633445).

11221220221211 is a wasteful number, since it uses less digits than its factorization.

11221220221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679443.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 11221220221211 its reverse (11212202212211), we get a palindrome (22433422433422).

The spelling of 11221220221211 in words is "eleven trillion, two hundred twenty-one billion, two hundred twenty million, two hundred twenty-one thousand, two hundred eleven".