12021100109 has 2 divisors, whose sum is σ = 12021100110. Its totient is φ = 12021100108.

The previous prime is 12021100067. The next prime is 12021100151. The reversal of 12021100109 is 90100112021.

12021100109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (12021100067) and next prime (12021100151).

It can be written as a sum of positive squares in only one way, i.e., 11609416009 + 411684100 = 107747^2 + 20290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12021100109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12021100309) 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, 6010550054 + 6010550055.

It is an arithmetic number, because the mean of its divisors is an integer number (6010550055).

Almost surely, 2^12021100109 is an apocalyptic number.

It is an amenable number.

12021100109 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021100109 is an equidigital number, since it uses as much as digits as its factorization.

12021100109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 17.

The spelling of 12021100109 in words is "twelve billion, twenty-one million, one hundred thousand, one hundred nine".