12012100200121 has 4 divisors (see below), whose sum is σ = 13728114514432. Its totient is φ = 10296085885812.

The previous prime is 12012100200103. The next prime is 12012100200181. The reversal of 12012100200121 is 12100200121021.

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 a cyclic number.

It is not a de Polignac number, because 12012100200121 - 2²³ = 12012091811513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12012100200181) 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, 858007157145 + ... + 858007157158.

It is an arithmetic number, because the mean of its divisors is an integer number (3432028628608).

Almost surely, 2^{12012100200121} is an apocalyptic number.

It is an amenable number.

12012100200121 is a deficient number, since it is larger than the sum of its proper divisors (1716014314311).

12012100200121 is an equidigital number, since it uses as much as digits as its factorization.

12012100200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1716014314310.

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

Adding to 12012100200121 its reverse (12100200121021), we get a palindrome (24112300321142).

The spelling of 12012100200121 in words is "twelve trillion, twelve billion, one hundred million, two hundred thousand, one hundred twenty-one".