11221020210221 has 8 divisors (see below), whose sum is σ = 11452830288120. Its totient is φ = 10989954307072.

The previous prime is 11221020210151. The next prime is 11221020210269. The reversal of 11221020210221 is 12201202012211.

It can be written as a sum of positive squares in 4 ways, for example, as 970688005225 + 10250332204996 = 985235^2 + 3201614^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11221020210221 - 2²² = 11221016015917 is a prime.

It is a super-2 number, since 2×11221020210221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11221020210221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221020210821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186013220 + ... + 186073533.

It is an arithmetic number, because the mean of its divisors is an integer number (1431603786015).

Almost surely, 2^{11221020210221} is an apocalyptic number.

It is an amenable number.

11221020210221 is a deficient number, since it is larger than the sum of its proper divisors (231810077899).

11221020210221 is an equidigital number, since it uses as much as digits as its factorization.

11221020210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372087375.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 11221020210221 its reverse (12201202012211), we get a palindrome (23422222222432).

The spelling of 11221020210221 in words is "eleven trillion, two hundred twenty-one billion, twenty million, two hundred ten thousand, two hundred twenty-one".