12012100021121 has 4 divisors (see below), whose sum is σ = 12013444718292. Its totient is φ = 12010755323952.

The previous prime is 12012100021111. The next prime is 12012100021123. The reversal of 12012100021121 is 12112000121021.

12012100021121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 8887464004225 + 3124636016896 = 2981185^2 + 1767664^2 .

It is a cyclic number.

It is not a de Polignac number, because 12012100021121 - 2¹⁸ = 12012099758977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12012100021096 and 12012100021105.

It is not an unprimeable number, because it can be changed into a prime (12012100021123) 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, 672335186 + ... + 672353051.

It is an arithmetic number, because the mean of its divisors is an integer number (3003361179573).

Almost surely, 2^{12012100021121} is an apocalyptic number.

It is an amenable number.

12012100021121 is a deficient number, since it is larger than the sum of its proper divisors (1344697171).

12012100021121 is an equidigital number, since it uses as much as digits as its factorization.

12012100021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344697170.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12012100021121 its reverse (12112000121021), we get a palindrome (24124100142142).

The spelling of 12012100021121 in words is "twelve trillion, twelve billion, one hundred million, twenty-one thousand, one hundred twenty-one".