11011101121021 has 2 divisors, whose sum is σ = 11011101121022. Its totient is φ = 11011101121020.

The previous prime is 11011101120989. The next prime is 11011101121051. The reversal of 11011101121021 is 12012110111011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10786035324100 + 225065796921 = 3284210^2 + 474411^2 .

It is a cyclic number.

It is not a de Polignac number, because 11011101121021 - 2⁵ = 11011101120989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11011101120992 and 11011101121010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11011101121051) 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, 5505550560510 + 5505550560511.

It is an arithmetic number, because the mean of its divisors is an integer number (5505550560511).

Almost surely, 2^{11011101121021} is an apocalyptic number.

It is an amenable number.

11011101121021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011101121021 is an equidigital number, since it uses as much as digits as its factorization.

11011101121021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 11011101121021 its reverse (12012110111011), we get a palindrome (23023211232032).

The spelling of 11011101121021 in words is "eleven trillion, eleven billion, one hundred one million, one hundred twenty-one thousand, twenty-one".