12120000220121 has 2 divisors, whose sum is σ = 12120000220122. Its totient is φ = 12120000220120.

The previous prime is 12120000220103. The next prime is 12120000220171. The reversal of 12120000220121 is 12102200002121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12081262107721 + 38738112400 = 3475811^2 + 196820^2 .

It is an emirp because it is prime and its reverse (12102200002121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12120000220121 - 2⁶ = 12120000220057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12120000220096 and 12120000220105.

It is not a weakly prime, because it can be changed into another prime (12120000220171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060000110060 + 6060000110061.

It is an arithmetic number, because the mean of its divisors is an integer number (6060000110061).

Almost surely, 2^{12120000220121} is an apocalyptic number.

It is an amenable number.

12120000220121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12120000220121 is an equidigital number, since it uses as much as digits as its factorization.

12120000220121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12120000220121 its reverse (12102200002121), we get a palindrome (24222200222242).

The spelling of 12120000220121 in words is "twelve trillion, one hundred twenty billion, two hundred twenty thousand, one hundred twenty-one".