12005224521 has 8 divisors (see below), whose sum is σ = 16035399840. Its totient is φ = 7989266112.

The previous prime is 12005224519. The next prime is 12005224547. The reversal of 12005224521 is 12542250021.

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

It is not a de Polignac number, because 12005224521 - 2¹ = 12005224519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12005224491 and 12005224500.

It is not an unprimeable number, because it can be changed into a prime (12005224501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3552256 + ... + 3555633.

It is an arithmetic number, because the mean of its divisors is an integer number (2004424980).

Almost surely, 2^12005224521 is an apocalyptic number.

It is an amenable number.

12005224521 is a deficient number, since it is larger than the sum of its proper divisors (4030175319).

12005224521 is an equidigital number, since it uses as much as digits as its factorization.

12005224521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7108455.

The product of its (nonzero) digits is 1600, while the sum is 24.

Adding to 12005224521 its reverse (12542250021), we get a palindrome (24547474542).

The spelling of 12005224521 in words is "twelve billion, five million, two hundred twenty-four thousand, five hundred twenty-one".