12000022121 has 4 divisors (see below), whose sum is σ = 12002233044. Its totient is φ = 11997811200.

The previous prime is 12000022063. The next prime is 12000022123. The reversal of 12000022121 is 12122000021.

It is a happy number.

12000022121 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 11049163225 + 950858896 = 105115^2 + 30836^2 .

It is a cyclic number.

It is not a de Polignac number, because 12000022121 - 2¹⁸ = 11999759977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12000022123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1097300 + ... + 1108181.

It is an arithmetic number, because the mean of its divisors is an integer number (3000558261).

Almost surely, 2^12000022121 is an apocalyptic number.

It is an amenable number.

12000022121 is a deficient number, since it is larger than the sum of its proper divisors (2210923).

12000022121 is an equidigital number, since it uses as much as digits as its factorization.

12000022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2210922.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12000022121 its reverse (12122000021), we get a palindrome (24122022142).

The spelling of 12000022121 in words is "twelve billion, twenty-two thousand, one hundred twenty-one".