12221112122201 has 2 divisors, whose sum is σ = 12221112122202. Its totient is φ = 12221112122200.

The previous prime is 12221112122183. The next prime is 12221112122231. The reversal of 12221112122201 is 10222121112221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6585900822601 + 5635211299600 = 2566301^2 + 2373860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12221112122201 is a prime.

It is not a weakly prime, because it can be changed into another prime (12221112122231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110556061100 + 6110556061101.

It is an arithmetic number, because the mean of its divisors is an integer number (6110556061101).

Almost surely, 2^{12221112122201} is an apocalyptic number.

It is an amenable number.

12221112122201 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221112122201 is an equidigital number, since it uses as much as digits as its factorization.

12221112122201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 12221112122201 its reverse (10222121112221), we get a palindrome (22443233234422).

The spelling of 12221112122201 in words is "twelve trillion, two hundred twenty-one billion, one hundred twelve million, one hundred twenty-two thousand, two hundred one".