12021297523 has 2 divisors, whose sum is σ = 12021297524. Its totient is φ = 12021297522.

The previous prime is 12021297487. The next prime is 12021297643. The reversal of 12021297523 is 32579212021.

12021297523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12021297523 is a prime.

It is not a weakly prime, because it can be changed into another prime (12021291523) 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, 6010648761 + 6010648762.

It is an arithmetic number, because the mean of its divisors is an integer number (6010648762).

Almost surely, 2^12021297523 is an apocalyptic number.

12021297523 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021297523 is an equidigital number, since it uses as much as digits as its factorization.

12021297523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 34.

The spelling of 12021297523 in words is "twelve billion, twenty-one million, two hundred ninety-seven thousand, five hundred twenty-three".