12002012221 has 2 divisors, whose sum is σ = 12002012222. Its totient is φ = 12002012220.

The previous prime is 12002012213. The next prime is 12002012333. The reversal of 12002012221 is 12221020021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10203828196 + 1798184025 = 101014^2 + 42405^2 .

It is a cyclic number.

It is not a de Polignac number, because 12002012221 - 2³ = 12002012213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12002012201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6001006110 + 6001006111.

It is an arithmetic number, because the mean of its divisors is an integer number (6001006111).

Almost surely, 2^12002012221 is an apocalyptic number.

It is an amenable number.

12002012221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12002012221 is an equidigital number, since it uses as much as digits as its factorization.

12002012221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 12002012221 its reverse (12221020021), we get a palindrome (24223032242).

The spelling of 12002012221 in words is "twelve billion, two million, twelve thousand, two hundred twenty-one".