12421222212420 has 72 divisors (see below), whose sum is σ = 43060237007424. Its totient is φ = 2839136505408.

The previous prime is 12421222212403. The next prime is 12421222212463. The reversal of 12421222212420 is 2421222212421.

12421222212420 is a `hidden beast` number, since 1 + 2 + 4 + 2 + 1 + 2 + 22 + 212 + 420 = 666.

It is a super-2 number, since 2×12421222212420² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4929055174 + ... + 4929057693.

Almost surely, 2^{12421222212420} is an apocalyptic number.

12421222212420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12421222212420 is an abundant number, since it is smaller than the sum of its proper divisors (30639014795004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12421222212420 is a wasteful number, since it uses less digits than its factorization.

12421222212420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9858112889 (or 9858112884 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

Adding to 12421222212420 its reverse (2421222212421), we get a palindrome (14842444424841).

Subtracting from 12421222212420 its reverse (2421222212421), we obtain a palindrome (9999999999999).

The spelling of 12421222212420 in words is "twelve trillion, four hundred twenty-one billion, two hundred twenty-two million, two hundred twelve thousand, four hundred twenty".