12305054521 has 8 divisors (see below), whose sum is σ = 12608009064. Its totient is φ = 12002234880.

The previous prime is 12305054507. The next prime is 12305054539. The reversal of 12305054521 is 12545050321.

It can be written as a sum of positive squares in 4 ways, for example, as 698896 + 12304355625 = 836^2 + 110925^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12305054521 - 2⁹ = 12305054009 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12305054521.

It is not an unprimeable number, because it can be changed into a prime (12305054501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165205 + ... + 227821.

It is an arithmetic number, because the mean of its divisors is an integer number (1576001133).

Almost surely, 2^12305054521 is an apocalyptic number.

It is an amenable number.

12305054521 is a deficient number, since it is larger than the sum of its proper divisors (302954543).

12305054521 is an equidigital number, since it uses as much as digits as its factorization.

12305054521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67451.

The product of its (nonzero) digits is 6000, while the sum is 28.

The spelling of 12305054521 in words is "twelve billion, three hundred five million, fifty-four thousand, five hundred twenty-one".