11002120121 has 2 divisors, whose sum is σ = 11002120122. Its totient is φ = 11002120120.

The previous prime is 11002120111. The next prime is 11002120123. The reversal of 11002120121 is 12102120011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8332951225 + 2669168896 = 91285^2 + 51664^2 .

It is a cyclic number.

It is not a de Polignac number, because 11002120121 - 2⁶ = 11002120057 is a prime.

It is a Sophie Germain prime.

Together with 11002120123, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11002120123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5501060060 + 5501060061.

It is an arithmetic number, because the mean of its divisors is an integer number (5501060061).

Almost surely, 2^11002120121 is an apocalyptic number.

It is an amenable number.

11002120121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11002120121 is an equidigital number, since it uses as much as digits as its factorization.

11002120121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11002120121 its reverse (12102120011), we get a palindrome (23104240132).

The spelling of 11002120121 in words is "eleven billion, two million, one hundred twenty thousand, one hundred twenty-one".