11020212121 has 2 divisors, whose sum is σ = 11020212122. Its totient is φ = 11020212120.

The previous prime is 11020212109. The next prime is 11020212131. The reversal of 11020212121 is 12121202011.

11020212121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10447088521 + 573123600 = 102211^2 + 23940^2 .

It is a cyclic number.

It is not a de Polignac number, because 11020212121 - 2⁵ = 11020212089 is a prime.

It is not a weakly prime, because it can be changed into another prime (11020212131) 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, 5510106060 + 5510106061.

It is an arithmetic number, because the mean of its divisors is an integer number (5510106061).

Almost surely, 2^11020212121 is an apocalyptic number.

It is an amenable number.

11020212121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11020212121 is an equidigital number, since it uses as much as digits as its factorization.

11020212121 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 11020212121 its reverse (12121202011), we get a palindrome (23141414132).

The spelling of 11020212121 in words is "eleven billion, twenty million, two hundred twelve thousand, one hundred twenty-one".