11121102121021 has 2 divisors, whose sum is σ = 11121102121022. Its totient is φ = 11121102121020.

The previous prime is 11121102120971. The next prime is 11121102121033. The reversal of 11121102121021 is 12012120112111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6746252996025 + 4374849124996 = 2597355^2 + 2091614^2 .

It is a cyclic number.

It is not a de Polignac number, because 11121102121021 - 2³⁷ = 10983663167549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11121102120986 and 11121102121004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11121102121061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560551060510 + 5560551060511.

It is an arithmetic number, because the mean of its divisors is an integer number (5560551060511).

Almost surely, 2^{11121102121021} is an apocalyptic number.

It is an amenable number.

11121102121021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121102121021 is an equidigital number, since it uses as much as digits as its factorization.

11121102121021 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 16.

Adding to 11121102121021 its reverse (12012120112111), we get a palindrome (23133222233132).

The spelling of 11121102121021 in words is "eleven trillion, one hundred twenty-one billion, one hundred two million, one hundred twenty-one thousand, twenty-one".