12012121201 has 2 divisors, whose sum is σ = 12012121202. Its totient is φ = 12012121200.

The previous prime is 12012121109. The next prime is 12012121207. The reversal of 12012121201 is 10212121021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10495797601 + 1516323600 = 102449^2 + 38940^2 .

It is an emirp because it is prime and its reverse (10212121021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12012121201 - 2²⁹ = 11475250289 is a prime.

It is not a weakly prime, because it can be changed into another prime (12012121207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006060600 + 6006060601.

It is an arithmetic number, because the mean of its divisors is an integer number (6006060601).

Almost surely, 2^12012121201 is an apocalyptic number.

It is an amenable number.

12012121201 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012121201 is an equidigital number, since it uses as much as digits as its factorization.

12012121201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12012121201 its reverse (10212121021), we get a palindrome (22224242222).

The spelling of 12012121201 in words is "twelve billion, twelve million, one hundred twenty-one thousand, two hundred one".