121221200120011 has 2 divisors, whose sum is σ = 121221200120012. Its totient is φ = 121221200120010.

The previous prime is 121221200119937. The next prime is 121221200120093. The reversal of 121221200120011 is 110021002122121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121221200120011 - 2⁷ = 121221200119883 is a prime.

It is not a weakly prime, because it can be changed into another prime (121221200120611) 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, 60610600060005 + 60610600060006.

It is an arithmetic number, because the mean of its divisors is an integer number (60610600060006).

Almost surely, 2^{121221200120011} is an apocalyptic number.

121221200120011 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221200120011 is an equidigital number, since it uses as much as digits as its factorization.

121221200120011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121221200120011 its reverse (110021002122121), we get a palindrome (231242202242132).

The spelling of 121221200120011 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred million, one hundred twenty thousand, eleven".