12421442201 has 4 divisors (see below), whose sum is σ = 14195933952. Its totient is φ = 10646950452.

The previous prime is 12421442191. The next prime is 12421442213. The reversal of 12421442201 is 10224412421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10224412421 = 16693 ⋅612497.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12421442201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12421442291) 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, 887245865 + ... + 887245878.

It is an arithmetic number, because the mean of its divisors is an integer number (3548983488).

Almost surely, 2^12421442201 is an apocalyptic number.

It is an amenable number.

12421442201 is a deficient number, since it is larger than the sum of its proper divisors (1774491751).

12421442201 is an equidigital number, since it uses as much as digits as its factorization.

12421442201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774491750.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 12421442201 its reverse (10224412421), we get a palindrome (22645854622).

The spelling of 12421442201 in words is "twelve billion, four hundred twenty-one million, four hundred forty-two thousand, two hundred one".