12069111521 has 2 divisors, whose sum is σ = 12069111522. Its totient is φ = 12069111520.

The previous prime is 12069111491. The next prime is 12069111533. The reversal of 12069111521 is 12511196021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6607901521 + 5461210000 = 81289^2 + 73900^2 .

It is a cyclic number.

It is not a de Polignac number, because 12069111521 - 2¹⁰ = 12069110497 is a prime.

It is not a weakly prime, because it can be changed into another prime (12069111421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6034555760 + 6034555761.

It is an arithmetic number, because the mean of its divisors is an integer number (6034555761).

Almost surely, 2^12069111521 is an apocalyptic number.

It is an amenable number.

12069111521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12069111521 is an equidigital number, since it uses as much as digits as its factorization.

12069111521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 29.

The spelling of 12069111521 in words is "twelve billion, sixty-nine million, one hundred eleven thousand, five hundred twenty-one".