12421321201 has 4 divisors (see below), whose sum is σ = 13151987172. Its totient is φ = 11690655232.

The previous prime is 12421321169. The next prime is 12421321229. The reversal of 12421321201 is 10212312421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10212312421 = 47 ⋅217283243.

It can be written as a sum of positive squares in 2 ways, for example, as 3633196176 + 8788125025 = 60276^2 + 93745^2 .

It is a cyclic number.

It is not a de Polignac number, because 12421321201 - 2⁵ = 12421321169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12421321001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 365332960 + ... + 365332993.

It is an arithmetic number, because the mean of its divisors is an integer number (3287996793).

Almost surely, 2^12421321201 is an apocalyptic number.

It is an amenable number.

12421321201 is a deficient number, since it is larger than the sum of its proper divisors (730665971).

12421321201 is an equidigital number, since it uses as much as digits as its factorization.

12421321201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730665970.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 12421321201 its reverse (10212312421), we get a palindrome (22633633622).

The spelling of 12421321201 in words is "twelve billion, four hundred twenty-one million, three hundred twenty-one thousand, two hundred one".