12421100420 has 24 divisors (see below), whose sum is σ = 26097614424. Its totient is φ = 4965906176.

The previous prime is 12421100407. The next prime is 12421100431. The reversal of 12421100420 is 2400112421.

12421100420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 204661636 + 12216438784 = 14306^2 + 110528^2 .

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 7 ways as a sum of consecutive naturals, for example, 117929 + ... + 196848.

It is an arithmetic number, because the mean of its divisors is an integer number (1087400601).

Almost surely, 2^12421100420 is an apocalyptic number.

12421100420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12421100420 is an abundant number, since it is smaller than the sum of its proper divisors (13676514004).

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

12421100420 is a wasteful number, since it uses less digits than its factorization.

12421100420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316759 (or 316757 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12421100420 its reverse (2400112421), we get a palindrome (14821212841).

The spelling of 12421100420 in words is "twelve billion, four hundred twenty-one million, one hundred thousand, four hundred twenty".