12452509121 has 4 divisors (see below), whose sum is σ = 13410394452. Its totient is φ = 11494623792.

The previous prime is 12452509109. The next prime is 12452509169. The reversal of 12452509121 is 12190525421.

12452509121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6514265521 + 5938243600 = 80711^2 + 77060^2 .

It is a cyclic number.

It is not a de Polignac number, because 12452509121 - 2⁶ = 12452509057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12452509171) 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 in 3 ways as a sum of consecutive naturals, for example, 478942646 + ... + 478942671.

It is an arithmetic number, because the mean of its divisors is an integer number (3352598613).

Almost surely, 2^12452509121 is an apocalyptic number.

It is an amenable number.

12452509121 is a deficient number, since it is larger than the sum of its proper divisors (957885331).

12452509121 is an equidigital number, since it uses as much as digits as its factorization.

12452509121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957885330.

The product of its (nonzero) digits is 7200, while the sum is 32.

The spelling of 12452509121 in words is "twelve billion, four hundred fifty-two million, five hundred nine thousand, one hundred twenty-one".