11221022120021 has 12 divisors (see below), whose sum is σ = 13053214948140. Its totient is φ = 9617879537280.

The previous prime is 11221022119999. The next prime is 11221022120051. The reversal of 11221022120021 is 12002122012211.

It can be written as a sum of positive squares in 2 ways, for example, as 7460622439396 + 3760399680625 = 2731414^2 + 1939175^2 .

It is not a de Polignac number, because 11221022120021 - 2¹⁴ = 11221022103637 is a prime.

It is a super-2 number, since 2×11221022120021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221022120051) 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, 1829015 + ... + 5078123.

It is an arithmetic number, because the mean of its divisors is an integer number (1087767912345).

Almost surely, 2^{11221022120021} is an apocalyptic number.

It is an amenable number.

11221022120021 is a deficient number, since it is larger than the sum of its proper divisors (1832192828119).

11221022120021 is an equidigital number, since it uses as much as digits as its factorization.

11221022120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3319604 (or 3319597 counting only the distinct ones).

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

Adding to 11221022120021 its reverse (12002122012211), we get a palindrome (23223144132232).

The spelling of 11221022120021 in words is "eleven trillion, two hundred twenty-one billion, twenty-two million, one hundred twenty thousand, twenty-one".