12421421456206 has 32 divisors (see below), whose sum is σ = 21762040504320. Its totient is φ = 5206579990656.

The previous prime is 12421421456203. The next prime is 12421421456237. The reversal of 12421421456206 is 60265412412421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421421456201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5612395 + ... + 7506118.

It is an arithmetic number, because the mean of its divisors is an integer number (680063765760).

Almost surely, 2^{12421421456206} is an apocalyptic number.

12421421456206 is a deficient number, since it is larger than the sum of its proper divisors (9340619048114).

12421421456206 is a wasteful number, since it uses less digits than its factorization.

12421421456206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13120008.

The product of its (nonzero) digits is 184320, while the sum is 40.

Adding to 12421421456206 its reverse (60265412412421), we get a palindrome (72686833868627).

The spelling of 12421421456206 in words is "twelve trillion, four hundred twenty-one billion, four hundred twenty-one million, four hundred fifty-six thousand, two hundred six".