11221121020011 has 32 divisors (see below), whose sum is σ = 17842927807488. Its totient is φ = 6133060644480.

The previous prime is 11221121020007. The next prime is 11221121020051. The reversal of 11221121020011 is 11002012112211.

It is a happy number.

It is not a de Polignac number, because 11221121020011 - 2² = 11221121020007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11221121020051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13346481 + ... + 14162301.

It is an arithmetic number, because the mean of its divisors is an integer number (557591493984).

Almost surely, 2^{11221121020011} is an apocalyptic number.

11221121020011 is a deficient number, since it is larger than the sum of its proper divisors (6621806787477).

11221121020011 is a wasteful number, since it uses less digits than its factorization.

11221121020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844331.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11221121020011 its reverse (11002012112211), we get a palindrome (22223133132222).

The spelling of 11221121020011 in words is "eleven trillion, two hundred twenty-one billion, one hundred twenty-one million, twenty thousand, eleven".