12421422504242 has 4 divisors (see below), whose sum is σ = 18632133756366. Its totient is φ = 6210711252120.

The previous prime is 12421422504241. The next prime is 12421422504263. The reversal of 12421422504242 is 24240522412421.

12421422504242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 12068599572121 + 352822932121 = 3473989^2 + 593989^2 .

It is not an unprimeable number, because it can be changed into a prime (12421422504241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3105355626059 + ... + 3105355626062.

Almost surely, 2^{12421422504242} is an apocalyptic number.

12421422504242 is a deficient number, since it is larger than the sum of its proper divisors (6210711252124).

12421422504242 is an equidigital number, since it uses as much as digits as its factorization.

12421422504242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6210711252123.

The product of its (nonzero) digits is 81920, while the sum is 35.

Adding to 12421422504242 its reverse (24240522412421), we get a palindrome (36661944916663).

The spelling of 12421422504242 in words is "twelve trillion, four hundred twenty-one billion, four hundred twenty-two million, five hundred four thousand, two hundred forty-two".