12141220 has 72 divisors (see below), whose sum is σ = 31974264. Its totient is φ = 3838464.

The previous prime is 12141203. The next prime is 12141221. The reversal of 12141220 is 2214121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 86436 + 12054784 = 294^2 + 3472^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 12141220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12141221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12264 + ... + 13216.

It is an arithmetic number, because the mean of its divisors is an integer number (444087).

Almost surely, 2^12141220 is an apocalyptic number.

12141220 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 12141220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15987132).

12141220 is an abundant number, since it is smaller than the sum of its proper divisors (19833044).

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

12141220 is a wasteful number, since it uses less digits than its factorization.

12141220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989 (or 980 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 12141220 is about 3484.4253471699. The cubic root of 12141220 is about 229.8374402683.

Adding to 12141220 its reverse (2214121), we get a palindrome (14355341).

The spelling of 12141220 in words is "twelve million, one hundred forty-one thousand, two hundred twenty".