12001220 has 48 divisors (see below), whose sum is σ = 31425408. Its totient is φ = 3740160.

The previous prime is 12001211. The next prime is 12001261. The reversal of 12001220 is 2210021.

It is a junction number, because it is equal to n+sod(n) for n = 12001198 and 12001207.

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, 2357 + ... + 5436.

It is an arithmetic number, because the mean of its divisors is an integer number (654696).

Almost surely, 2^12001220 is an apocalyptic number.

12001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001220 is an abundant number, since it is smaller than the sum of its proper divisors (19424188).

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

12001220 is a wasteful number, since it uses less digits than its factorization.

12001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7820 (or 7818 counting only the distinct ones).

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

The square root of 12001220 is about 3464.2777024944. The cubic root of 12001220 is about 228.9506068665.

Adding to 12001220 its reverse (2210021), we get a palindrome (14211241).

It can be divided in two parts, 12001 and 220, that added together give a palindrome (12221).

The spelling of 12001220 in words is "twelve million, one thousand, two hundred twenty".