12069142721 has 2 divisors, whose sum is σ = 12069142722. Its totient is φ = 12069142720.

The previous prime is 12069142699. The next prime is 12069142727. The reversal of 12069142721 is 12724196021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8692951696 + 3376191025 = 93236^2 + 58105^2 .

It is an emirp because it is prime and its reverse (12724196021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12069142721 - 2¹⁰ = 12069141697 is a prime.

It is not a weakly prime, because it can be changed into another prime (12069142727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6034571360 + 6034571361.

It is an arithmetic number, because the mean of its divisors is an integer number (6034571361).

Almost surely, 2^12069142721 is an apocalyptic number.

It is an amenable number.

12069142721 is a deficient number, since it is larger than the sum of its proper divisors (1).

12069142721 is an equidigital number, since it uses as much as digits as its factorization.

12069142721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 35.

The spelling of 12069142721 in words is "twelve billion, sixty-nine million, one hundred forty-two thousand, seven hundred twenty-one".