12421412421 has 16 divisors (see below), whose sum is σ = 18216833088. Its totient is φ = 7528126320.

The previous prime is 12421412401. The next prime is 12421412429.

It is a happy number.

12421412421 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12421412421 - 2¹⁷ = 12421281349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12421412391 and 12421412400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421412429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1551406 + ... + 1559391.

It is an arithmetic number, because the mean of its divisors is an integer number (1138552068).

Almost surely, 2^12421412421 is an apocalyptic number.

12421412421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12421412421 is a deficient number, since it is larger than the sum of its proper divisors (5795420667).

12421412421 is an equidigital number, since it uses as much as digits as its factorization.

12421412421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3110833 (or 3110811 counting only the distinct ones).

The product of its digits is 1024, while the sum is 24.

The spelling of 12421412421 in words is "twelve billion, four hundred twenty-one million, four hundred twelve thousand, four hundred twenty-one".