222121212201211 has 2 divisors, whose sum is σ = 222121212201212. Its totient is φ = 222121212201210.

The previous prime is 222121212201157. The next prime is 222121212201233. The reversal of 222121212201211 is 112102212121222.

It is an a-pointer prime, because the next prime (222121212201233) can be obtained adding 222121212201211 to its sum of digits (22).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 222121212201211 - 2²⁵ = 222121178646779 is a prime.

It is not a weakly prime, because it can be changed into another prime (222121212204211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111060606100605 + 111060606100606.

It is an arithmetic number, because the mean of its divisors is an integer number (111060606100606).

Almost surely, 2^{222121212201211} is an apocalyptic number.

222121212201211 is a deficient number, since it is larger than the sum of its proper divisors (1).

222121212201211 is an equidigital number, since it uses as much as digits as its factorization.

222121212201211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 222121212201211 its reverse (112102212121222), we get a palindrome (334223424322433).

The spelling of 222121212201211 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, two hundred twelve million, two hundred one thousand, two hundred eleven".