11101001020121 has 2 divisors, whose sum is σ = 11101001020122. Its totient is φ = 11101001020120.

The previous prime is 11101001020111. The next prime is 11101001020129. The reversal of 11101001020121 is 12102010010111.

11101001020121 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., 9794177089225 + 1306823930896 = 3129565^2 + 1143164^2 .

It is a cyclic number.

It is not a de Polignac number, because 11101001020121 - 2³⁸ = 10826123113177 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11101001020129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550500510060 + 5550500510061.

It is an arithmetic number, because the mean of its divisors is an integer number (5550500510061).

Almost surely, 2^{11101001020121} is an apocalyptic number.

It is an amenable number.

11101001020121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11101001020121 is an equidigital number, since it uses as much as digits as its factorization.

11101001020121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11101001020121 its reverse (12102010010111), we get a palindrome (23203011030232).

The spelling of 11101001020121 in words is "eleven trillion, one hundred one billion, one million, twenty thousand, one hundred twenty-one".