12100020109 has 2 divisors, whose sum is σ = 12100020110. Its totient is φ = 12100020108.

The previous prime is 12100020073. The next prime is 12100020143. The reversal of 12100020109 is 90102000121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8105400900 + 3994619209 = 90030^2 + 63203^2 .

It is a cyclic number.

It is not a de Polignac number, because 12100020109 - 2²¹ = 12097922957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12100020092 and 12100020101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12100020199) 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, 6050010054 + 6050010055.

It is an arithmetic number, because the mean of its divisors is an integer number (6050010055).

Almost surely, 2^12100020109 is an apocalyptic number.

It is an amenable number.

12100020109 is a deficient number, since it is larger than the sum of its proper divisors (1).

12100020109 is an equidigital number, since it uses as much as digits as its factorization.

12100020109 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 16.

The spelling of 12100020109 in words is "twelve billion, one hundred million, twenty thousand, one hundred nine".