12100120100221 has 4 divisors (see below), whose sum is σ = 12100160860732. Its totient is φ = 12100079339712.

The previous prime is 12100120100191. The next prime is 12100120100227. The reversal of 12100120100221 is 12200102100121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7395060216996 + 4705059883225 = 2719386^2 + 2169115^2 .

It is a cyclic number.

It is not a de Polignac number, because 12100120100221 - 2¹³ = 12100120092029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100120100227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19931676 + ... + 20529781.

It is an arithmetic number, because the mean of its divisors is an integer number (3025040215183).

Almost surely, 2^{12100120100221} is an apocalyptic number.

It is an amenable number.

12100120100221 is a deficient number, since it is larger than the sum of its proper divisors (40760511).

12100120100221 is an equidigital number, since it uses as much as digits as its factorization.

12100120100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40760510.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12100120100221 its reverse (12200102100121), we get a palindrome (24300222200342).

The spelling of 12100120100221 in words is "twelve trillion, one hundred billion, one hundred twenty million, one hundred thousand, two hundred twenty-one".