12120020 has 48 divisors (see below), whose sum is σ = 28123200. Its totient is φ = 4350720.

The previous prime is 12120019. The next prime is 12120047. The reversal of 12120020 is 2002121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19271 + ... + 19889.

It is an arithmetic number, because the mean of its divisors is an integer number (585900).

Almost surely, 2^12120020 is an apocalyptic number.

12120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12120020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14061600).

12120020 is an abundant number, since it is smaller than the sum of its proper divisors (16003180).

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

12120020 is a wasteful number, since it uses less digits than its factorization.

12120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728 (or 726 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 12120020 is about 3481.3819095296. The cubic root of 12120020 is about 229.7035879178.

Adding to 12120020 its reverse (2002121), we get a palindrome (14122141).

The spelling of 12120020 in words is "twelve million, one hundred twenty thousand, twenty".