11022011121221 has 4 divisors (see below), whose sum is σ = 11022521681100. Its totient is φ = 11021500561344.

The previous prime is 11022011121169. The next prime is 11022011121227. The reversal of 11022011121221 is 12212111022011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1582277188996 + 9439733932225 = 1257886^2 + 3072415^2 .

It is a cyclic number.

It is not a de Polignac number, because 11022011121221 - 2⁶ = 11022011121157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11022011121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11022011121227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255247556 + ... + 255290733.

It is an arithmetic number, because the mean of its divisors is an integer number (2755630420275).

Almost surely, 2^{11022011121221} is an apocalyptic number.

It is an amenable number.

11022011121221 is a deficient number, since it is larger than the sum of its proper divisors (510559879).

11022011121221 is an equidigital number, since it uses as much as digits as its factorization.

11022011121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510559878.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11022011121221 its reverse (12212111022011), we get a palindrome (23234122143232).

The spelling of 11022011121221 in words is "eleven trillion, twenty-two billion, eleven million, one hundred twenty-one thousand, two hundred twenty-one".