12011212020109 has 2 divisors, whose sum is σ = 12011212020110. Its totient is φ = 12011212020108.

The previous prime is 12011212020107. The next prime is 12011212020131. The reversal of 12011212020109 is 90102021211021.

It is an a-pointer prime, because the next prime (12011212020131) can be obtained adding 12011212020109 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8517770664484 + 3493441355625 = 2918522^2 + 1869075^2 .

It is a cyclic number.

It is not a de Polignac number, because 12011212020109 - 2¹ = 12011212020107 is a prime.

Together with 12011212020107, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12011212020109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12011212020107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005606010054 + 6005606010055.

It is an arithmetic number, because the mean of its divisors is an integer number (6005606010055).

Almost surely, 2^{12011212020109} is an apocalyptic number.

It is an amenable number.

12011212020109 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011212020109 is an equidigital number, since it uses as much as digits as its factorization.

12011212020109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 12011212020109 in words is "twelve trillion, eleven billion, two hundred twelve million, twenty thousand, one hundred nine".