12001120121 has 2 divisors, whose sum is σ = 12001120122. Its totient is φ = 12001120120.

The previous prime is 12001120099. The next prime is 12001120133. The reversal of 12001120121 is 12102110021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10514246521 + 1486873600 = 102539^2 + 38560^2 .

It is a cyclic number.

It is not a de Polignac number, because 12001120121 - 2⁶ = 12001120057 is a prime.

It is not a weakly prime, because it can be changed into another prime (12001120171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6000560060 + 6000560061.

It is an arithmetic number, because the mean of its divisors is an integer number (6000560061).

Almost surely, 2^12001120121 is an apocalyptic number.

It is an amenable number.

12001120121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12001120121 is an equidigital number, since it uses as much as digits as its factorization.

12001120121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12001120121 its reverse (12102110021), we get a palindrome (24103230142).

The spelling of 12001120121 in words is "twelve billion, one million, one hundred twenty thousand, one hundred twenty-one".