12120220 has 24 divisors (see below), whose sum is σ = 29088864. Its totient is φ = 4155456.

The previous prime is 12120181. The next prime is 12120223. The reversal of 12120220 is 2202121.

12120220 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (10).

12120220 is strictly pandigital in base 8.

It is a zygodrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 12120197 and 12120206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43147 + ... + 43426.

It is an arithmetic number, because the mean of its divisors is an integer number (1212036).

Almost surely, 2^12120220 is an apocalyptic number.

12120220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12120220 is an abundant number, since it is smaller than the sum of its proper divisors (16968644).

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

12120220 is a wasteful number, since it uses less digits than its factorization.

12120220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86589 (or 86587 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 12120220 is about 3481.4106336369. The cubic root of 12120220 is about 229.7048514049.

Adding to 12120220 its reverse (2202121), we get a palindrome (14322341).

The spelling of 12120220 in words is "twelve million, one hundred twenty thousand, two hundred twenty".