12121020011 has 2 divisors, whose sum is σ = 12121020012. Its totient is φ = 12121020010.

The previous prime is 12121020001. The next prime is 12121020019. The reversal of 12121020011 is 11002012121.

12121020011 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 is a cyclic number.

It is not a de Polignac number, because 12121020011 - 2²⁶ = 12053911147 is a prime.

It is a super-2 number, since 2×12121020011² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 12121019974 and 12121020001.

It is not a weakly prime, because it can be changed into another prime (12121020019) 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, 6060510005 + 6060510006.

It is an arithmetic number, because the mean of its divisors is an integer number (6060510006).

Almost surely, 2^12121020011 is an apocalyptic number.

12121020011 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121020011 is an equidigital number, since it uses as much as digits as its factorization.

12121020011 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 12121020011 its reverse (11002012121), we get a palindrome (23123032132).

The spelling of 12121020011 in words is "twelve billion, one hundred twenty-one million, twenty thousand, eleven".