12120211141221 has 4 divisors (see below), whose sum is σ = 16160281521632. Its totient is φ = 8080140760812.

The previous prime is 12120211141189. The next prime is 12120211141223. The reversal of 12120211141221 is 12214111202121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12120211141221 - 2⁵ = 12120211141189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120211141223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2020035190201 + ... + 2020035190206.

It is an arithmetic number, because the mean of its divisors is an integer number (4040070380408).

Almost surely, 2^{12120211141221} is an apocalyptic number.

It is an amenable number.

12120211141221 is a deficient number, since it is larger than the sum of its proper divisors (4040070380411).

12120211141221 is an equidigital number, since it uses as much as digits as its factorization.

12120211141221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4040070380410.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 12120211141221 its reverse (12214111202121), we get a palindrome (24334322343342).

The spelling of 12120211141221 in words is "twelve trillion, one hundred twenty billion, two hundred eleven million, one hundred forty-one thousand, two hundred twenty-one".