12421222120 has 16 divisors (see below), whose sum is σ = 27947749860. Its totient is φ = 4968488832.

The previous prime is 12421222109. The next prime is 12421222129. The reversal of 12421222120 is 2122212421.

It can be written as a sum of positive squares in 2 ways, for example, as 11949550596 + 471671524 = 109314^2 + 21718^2 .

It is not an unprimeable number, because it can be changed into a prime (12421222129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155265237 + ... + 155265316.

Almost surely, 2^12421222120 is an apocalyptic number.

12421222120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12421222120 is an abundant number, since it is smaller than the sum of its proper divisors (15526527740).

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

12421222120 is a wasteful number, since it uses less digits than its factorization.

12421222120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310530564 (or 310530560 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 12421222120 its reverse (2122212421), we get a palindrome (14543434541).

The spelling of 12421222120 in words is "twelve billion, four hundred twenty-one million, two hundred twenty-two thousand, one hundred twenty".