11021221210221 has 24 divisors (see below), whose sum is σ = 16856990092800. Its totient is φ = 6914863863936.

The previous prime is 11021221210169. The next prime is 11021221210229. The reversal of 11021221210221 is 12201212212011.

11021221210221 is a `hidden beast` number, since 1 + 1 + 0 + 212 + 21 + 210 + 221 = 666.

It is not a de Polignac number, because 11021221210221 - 2⁶ = 11021221210157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11021221210194 and 11021221210203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021221210229) 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, 438580 + ... + 4715378.

It is an arithmetic number, because the mean of its divisors is an integer number (702374587200).

Almost surely, 2^{11021221210221} is an apocalyptic number.

It is an amenable number.

11021221210221 is a deficient number, since it is larger than the sum of its proper divisors (5835768882579).

11021221210221 is a wasteful number, since it uses less digits than its factorization.

11021221210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4293665 (or 4293662 counting only the distinct ones).

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

Adding to 11021221210221 its reverse (12201212212011), we get a palindrome (23222433422232).

The spelling of 11021221210221 in words is "eleven trillion, twenty-one billion, two hundred twenty-one million, two hundred ten thousand, two hundred twenty-one".