12100220 has 24 divisors (see below), whose sum is σ = 27721008. Its totient is φ = 4400000.

The previous prime is 12100219. The next prime is 12100223. The reversal of 12100220 is 2200121.

12100220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12100198 and 12100207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100223) 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, 27281 + ... + 27720.

It is an arithmetic number, because the mean of its divisors is an integer number (1155042).

Almost surely, 2^12100220 is an apocalyptic number.

12100220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12100220 is an abundant number, since it is smaller than the sum of its proper divisors (15620788).

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

12100220 is a wasteful number, since it uses less digits than its factorization.

12100220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55021 (or 55019 counting only the distinct ones).

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

The square root of 12100220 is about 3478.5370488181. The cubic root of 12100220 is about 229.5784338341.

Adding to 12100220 its reverse (2200121), we get a palindrome (14300341).

Subtracting from 12100220 its reverse (2200121), we obtain a palindrome (9900099).

The spelling of 12100220 in words is "twelve million, one hundred thousand, two hundred twenty".