11021220202221 has 12 divisors (see below), whose sum is σ = 16509152895872. Its totient is φ = 7347480134652.

The previous prime is 11021220202217. The next prime is 11021220202243. The reversal of 11021220202221 is 12220202212011.

It is a happy number.

11021220202221 is a `hidden beast` number, since 1 + 1 + 0 + 21 + 220 + 202 + 221 = 666.

It is not a de Polignac number, because 11021220202221 - 2² = 11021220202217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11021220202194 and 11021220202203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021220203221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22677407581 + ... + 22677408066.

Almost surely, 2^{11021220202221} is an apocalyptic number.

It is an amenable number.

11021220202221 is a deficient number, since it is larger than the sum of its proper divisors (5487932693651).

11021220202221 is an frugal number, since it uses more digits than its factorization.

11021220202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45354815662 (or 45354815650 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 11021220202221 its reverse (12220202212011), we get a palindrome (23241422414232).

The spelling of 11021220202221 in words is "eleven trillion, twenty-one billion, two hundred twenty million, two hundred two thousand, two hundred twenty-one".