12100120221 has 12 divisors (see below), whose sum is σ = 18767533632. Its totient is φ = 6914354328.

The previous prime is 12100120217. The next prime is 12100120273. The reversal of 12100120221 is 12202100121.

It is not a de Polignac number, because 12100120221 - 2² = 12100120217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12100120197 and 12100120206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100120211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41156725 + ... + 41157018.

It is an arithmetic number, because the mean of its divisors is an integer number (1563961136).

Almost surely, 2^12100120221 is an apocalyptic number.

It is an amenable number.

12100120221 is a deficient number, since it is larger than the sum of its proper divisors (6667413411).

12100120221 is an equidigital number, since it uses as much as digits as its factorization.

12100120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82313760 (or 82313753 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12100120221 its reverse (12202100121), we get a palindrome (24302220342).

The spelling of 12100120221 in words is "twelve billion, one hundred million, one hundred twenty thousand, two hundred twenty-one".