11121022021 has 2 divisors, whose sum is σ = 11121022022. Its totient is φ = 11121022020.

The previous prime is 11121022009. The next prime is 11121022043. The reversal of 11121022021 is 12022012111.

11121022021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11006317921 + 114704100 = 104911^2 + 10710^2 .

It is a cyclic number.

It is not a de Polignac number, because 11121022021 - 2¹³ = 11121013829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11121021992 and 11121022010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11121022321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560511010 + 5560511011.

It is an arithmetic number, because the mean of its divisors is an integer number (5560511011).

Almost surely, 2^11121022021 is an apocalyptic number.

It is an amenable number.

11121022021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121022021 is an equidigital number, since it uses as much as digits as its factorization.

11121022021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11121022021 its reverse (12022012111), we get a palindrome (23143034132).

The spelling of 11121022021 in words is "eleven billion, one hundred twenty-one million, twenty-two thousand, twenty-one".