12120222100121 has 2 divisors, whose sum is σ = 12120222100122. Its totient is φ = 12120222100120.

The previous prime is 12120222100087. The next prime is 12120222100123. The reversal of 12120222100121 is 12100122202121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11998603210000 + 121618890121 = 3463900^2 + 348739^2 .

It is a cyclic number.

It is not a de Polignac number, because 12120222100121 - 2⁴² = 7722175589017 is a prime.

It is a Sophie Germain prime.

Together with 12120222100123, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12120222100121.

It is not a weakly prime, because it can be changed into another prime (12120222100123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060111050060 + 6060111050061.

It is an arithmetic number, because the mean of its divisors is an integer number (6060111050061).

Almost surely, 2^{12120222100121} is an apocalyptic number.

It is an amenable number.

12120222100121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12120222100121 is an equidigital number, since it uses as much as digits as its factorization.

12120222100121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12120222100121 its reverse (12100122202121), we get a palindrome (24220344302242).

The spelling of 12120222100121 in words is "twelve trillion, one hundred twenty billion, two hundred twenty-two million, one hundred thousand, one hundred twenty-one".