12012220001 has 2 divisors, whose sum is σ = 12012220002. Its totient is φ = 12012220000.

The previous prime is 12012219937. The next prime is 12012220049. The reversal of 12012220001 is 10002221021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7779416401 + 4232803600 = 88201^2 + 65060^2 .

It is a cyclic number.

It is not a de Polignac number, because 12012220001 - 2⁶ = 12012219937 is a prime.

It is not a weakly prime, because it can be changed into another prime (12012220091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006110000 + 6006110001.

It is an arithmetic number, because the mean of its divisors is an integer number (6006110001).

Almost surely, 2^12012220001 is an apocalyptic number.

It is an amenable number.

12012220001 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012220001 is an equidigital number, since it uses as much as digits as its factorization.

12012220001 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 11.

Adding to 12012220001 its reverse (10002221021), we get a palindrome (22014441022).

The spelling of 12012220001 in words is "twelve billion, twelve million, two hundred twenty thousand, one".