12023035561 has 2 divisors, whose sum is σ = 12023035562. Its totient is φ = 12023035560.

The previous prime is 12023035547. The next prime is 12023035573. The reversal of 12023035561 is 16553032021.

12023035561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11482194025 + 540841536 = 107155^2 + 23256^2 .

It is an emirp because it is prime and its reverse (16553032021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12023035561 - 2¹⁵ = 12023002793 is a prime.

It is not a weakly prime, because it can be changed into another prime (12023035501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6011517780 + 6011517781.

It is an arithmetic number, because the mean of its divisors is an integer number (6011517781).

Almost surely, 2^12023035561 is an apocalyptic number.

It is an amenable number.

12023035561 is a deficient number, since it is larger than the sum of its proper divisors (1).

12023035561 is an equidigital number, since it uses as much as digits as its factorization.

12023035561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 12023035561 its reverse (16553032021), we get a palindrome (28576067582).

The spelling of 12023035561 in words is "twelve billion, twenty-three million, thirty-five thousand, five hundred sixty-one".