12421052321 has 8 divisors (see below), whose sum is σ = 12963079080. Its totient is φ = 11886606592.

The previous prime is 12421052311. The next prime is 12421052389. The reversal of 12421052321 is 12325012421.

12421052321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 85840225 + 12335212096 = 9265^2 + 111064^2 .

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 12421052321 - 2¹⁰ = 12421051297 is a prime.

It is a super-2 number, since 2×12421052321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12421052311) 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 7 ways as a sum of consecutive naturals, for example, 1891910 + ... + 1898463.

It is an arithmetic number, because the mean of its divisors is an integer number (1620384885).

Almost surely, 2^12421052321 is an apocalyptic number.

It is an amenable number.

12421052321 is a deficient number, since it is larger than the sum of its proper divisors (542026759).

12421052321 is a wasteful number, since it uses less digits than its factorization.

12421052321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3790515.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 12421052321 its reverse (12325012421), we get a palindrome (24746064742).

The spelling of 12421052321 in words is "twelve billion, four hundred twenty-one million, fifty-two thousand, three hundred twenty-one".