11020020221 has 16 divisors (see below), whose sum is σ = 12909093120. Its totient is φ = 9209915520.

The previous prime is 11020020217. The next prime is 11020020223. The reversal of 11020020221 is 12202002011.

It is a happy number.

11020020221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11020020221 - 2² = 11020020217 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11020020223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 519695 + ... + 540483.

It is an arithmetic number, because the mean of its divisors is an integer number (806818320).

Almost surely, 2^11020020221 is an apocalyptic number.

It is an amenable number.

11020020221 is a deficient number, since it is larger than the sum of its proper divisors (1889072899).

11020020221 is a wasteful number, since it uses less digits than its factorization.

11020020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22684.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 11020020221 its reverse (12202002011), we get a palindrome (23222022232).

The spelling of 11020020221 in words is "eleven billion, twenty million, twenty thousand, two hundred twenty-one".