12442421401 has 4 divisors (see below), whose sum is σ = 12443256612. Its totient is φ = 12441586192.

The previous prime is 12442421371. The next prime is 12442421419. The reversal of 12442421401 is 10412424421.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6892320400 + 5550101001 = 83020^2 + 74499^2 .

It is a cyclic number.

It is not a de Polignac number, because 12442421401 - 2⁹ = 12442420889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12442421471) 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, 394846 + ... + 425191.

It is an arithmetic number, because the mean of its divisors is an integer number (3110814153).

Almost surely, 2^12442421401 is an apocalyptic number.

It is an amenable number.

12442421401 is a deficient number, since it is larger than the sum of its proper divisors (835211).

12442421401 is an equidigital number, since it uses as much as digits as its factorization.

12442421401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835210.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 12442421401 its reverse (10412424421), we get a palindrome (22854845822).

The spelling of 12442421401 in words is "twelve billion, four hundred forty-two million, four hundred twenty-one thousand, four hundred one".