12120022420 has 48 divisors (see below), whose sum is σ = 27791160768. Its totient is φ = 4403266560.

The previous prime is 12120022393. The next prime is 12120022427. The reversal of 12120022420 is 2422002121.

12120022420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12120022420² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12120022394 and 12120022403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120022427) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 222532 + ... + 271588.

It is an arithmetic number, because the mean of its divisors is an integer number (578982516).

Almost surely, 2^12120022420 is an apocalyptic number.

12120022420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12120022420 is an abundant number, since it is smaller than the sum of its proper divisors (15671138348).

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

12120022420 is a wasteful number, since it uses less digits than its factorization.

12120022420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50200 (or 50198 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 12120022420 its reverse (2422002121), we get a palindrome (14542024541).

The spelling of 12120022420 in words is "twelve billion, one hundred twenty million, twenty-two thousand, four hundred twenty".