12012021101009 has 2 divisors, whose sum is σ = 12012021101010. Its totient is φ = 12012021101008.

The previous prime is 12012021100999. The next prime is 12012021101029. The reversal of 12012021101009 is 90010112021021.

It is an a-pointer prime, because the next prime (12012021101029) can be obtained adding 12012021101009 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8961060211009 + 3050960890000 = 2993503^2 + 1746700^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12012021101009 is a prime.

It is not a weakly prime, because it can be changed into another prime (12012021101029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006010550504 + 6006010550505.

It is an arithmetic number, because the mean of its divisors is an integer number (6006010550505).

Almost surely, 2^{12012021101009} is an apocalyptic number.

It is an amenable number.

12012021101009 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012021101009 is an equidigital number, since it uses as much as digits as its factorization.

12012021101009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 12012021101009 in words is "twelve trillion, twelve billion, twenty-one million, one hundred one thousand, nine".