12011201009 has 2 divisors, whose sum is σ = 12011201010. Its totient is φ = 12011201008.

The previous prime is 12011201003. The next prime is 12011201011. The reversal of 12011201009 is 90010211021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10794586609 + 1216614400 = 103897^2 + 34880^2 .

It is a cyclic number.

It is not a de Polignac number, because 12011201009 - 2²⁰ = 12010152433 is a prime.

Together with 12011201011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12011201003) 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, 6005600504 + 6005600505.

It is an arithmetic number, because the mean of its divisors is an integer number (6005600505).

Almost surely, 2^12011201009 is an apocalyptic number.

It is an amenable number.

12011201009 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011201009 is an equidigital number, since it uses as much as digits as its factorization.

12011201009 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 12011201009 in words is "twelve billion, eleven million, two hundred one thousand, nine".