12000211200121 has 4 divisors (see below), whose sum is σ = 12000255560100. Its totient is φ = 12000166840144.

The previous prime is 12000211200083. The next prime is 12000211200137. The reversal of 12000211200121 is 12100211200021.

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 6624472178025 + 5375739022096 = 2573805^2 + 2318564^2 .

It is a cyclic number.

It is not a de Polignac number, because 12000211200121 - 2¹⁹ = 12000210675833 is a prime.

It is a super-2 number, since 2×12000211200121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12000211200421) 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, 21771706 + ... + 22316083.

It is an arithmetic number, because the mean of its divisors is an integer number (3000063890025).

Almost surely, 2^{12000211200121} is an apocalyptic number.

It is an amenable number.

12000211200121 is a deficient number, since it is larger than the sum of its proper divisors (44359979).

12000211200121 is an equidigital number, since it uses as much as digits as its factorization.

12000211200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44359978.

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

Adding to 12000211200121 its reverse (12100211200021), we get a palindrome (24100422400142).

The spelling of 12000211200121 in words is "twelve trillion, two hundred eleven million, two hundred thousand, one hundred twenty-one".