12042224221 has 2 divisors, whose sum is σ = 12042224222. Its totient is φ = 12042224220.

The previous prime is 12042224191. The next prime is 12042224291. The reversal of 12042224221 is 12242224021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11265487321 + 776736900 = 106139^2 + 27870^2 .

It is a cyclic number.

It is not a de Polignac number, because 12042224221 - 2¹⁵ = 12042191453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12042224192 and 12042224201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12042224291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6021112110 + 6021112111.

It is an arithmetic number, because the mean of its divisors is an integer number (6021112111).

Almost surely, 2^12042224221 is an apocalyptic number.

It is an amenable number.

12042224221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12042224221 is an equidigital number, since it uses as much as digits as its factorization.

12042224221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 12042224221 its reverse (12242224021), we get a palindrome (24284448242).

The spelling of 12042224221 in words is "twelve billion, forty-two million, two hundred twenty-four thousand, two hundred twenty-one".