11120121220221 has 24 divisors (see below), whose sum is σ = 17298663389280. Its totient is φ = 6842875765536.

The previous prime is 11120121220211. The next prime is 11120121220289. The reversal of 11120121220221 is 12202212102111.

11120121220221 is a `hidden beast` number, since 1 + 1 + 1 + 201 + 21 + 220 + 221 = 666.

It is not a de Polignac number, because 11120121220221 - 2¹⁰ = 11120121219197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11120121220194 and 11120121220203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11120121220211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1020070 + ... + 4825016.

It is an arithmetic number, because the mean of its divisors is an integer number (720777641220).

Almost surely, 2^{11120121220221} is an apocalyptic number.

It is an amenable number.

11120121220221 is a deficient number, since it is larger than the sum of its proper divisors (6178542169059).

11120121220221 is a wasteful number, since it uses less digits than its factorization.

11120121220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3829945 (or 3829942 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11120121220221 its reverse (12202212102111), we get a palindrome (23322333322332).

The spelling of 11120121220221 in words is "eleven trillion, one hundred twenty billion, one hundred twenty-one million, two hundred twenty thousand, two hundred twenty-one".