12011212021009 has 2 divisors, whose sum is σ = 12011212021010. Its totient is φ = 12011212021008.

The previous prime is 12011212020991. The next prime is 12011212021019. The reversal of 12011212021009 is 90012021211021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9323159958225 + 2688052062784 = 3053385^2 + 1639528^2 .

It is a cyclic number.

It is not a de Polignac number, because 12011212021009 - 2⁹ = 12011212020497 is a prime.

It is a super-2 number, since 2×12011212021009² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12011212021019) 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, 6005606010504 + 6005606010505.

It is an arithmetic number, because the mean of its divisors is an integer number (6005606010505).

Almost surely, 2^{12011212021009} is an apocalyptic number.

It is an amenable number.

12011212021009 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011212021009 is an equidigital number, since it uses as much as digits as its factorization.

12011212021009 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 12011212021009 in words is "twelve trillion, eleven billion, two hundred twelve million, twenty-one thousand, nine".