11212204321 has 2 divisors, whose sum is σ = 11212204322. Its totient is φ = 11212204320.

The previous prime is 11212204319. The next prime is 11212204331. The reversal of 11212204321 is 12340221211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10222221025 + 989983296 = 101105^2 + 31464^2 .

It is a cyclic number.

It is not a de Polignac number, because 11212204321 - 2¹ = 11212204319 is a prime.

Together with 11212204319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11212204331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606102160 + 5606102161.

It is an arithmetic number, because the mean of its divisors is an integer number (5606102161).

Almost surely, 2^11212204321 is an apocalyptic number.

It is an amenable number.

11212204321 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212204321 is an equidigital number, since it uses as much as digits as its factorization.

11212204321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 11212204321 its reverse (12340221211), we get a palindrome (23552425532).

The spelling of 11212204321 in words is "eleven billion, two hundred twelve million, two hundred four thousand, three hundred twenty-one".