221111201100211 has 2 divisors, whose sum is σ = 221111201100212. Its totient is φ = 221111201100210.

The previous prime is 221111201100161. The next prime is 221111201100227. The reversal of 221111201100211 is 112001102111122.

It is an a-pointer prime, because the next prime (221111201100227) can be obtained adding 221111201100211 to its sum of digits (16).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221111201100211 - 2⁹ = 221111201099699 is a prime.

It is not a weakly prime, because it can be changed into another prime (221111201101211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110555600550105 + 110555600550106.

It is an arithmetic number, because the mean of its divisors is an integer number (110555600550106).

Almost surely, 2^{221111201100211} is an apocalyptic number.

221111201100211 is a deficient number, since it is larger than the sum of its proper divisors (1).

221111201100211 is an equidigital number, since it uses as much as digits as its factorization.

221111201100211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 221111201100211 its reverse (112001102111122), we get a palindrome (333112303211333).

The spelling of 221111201100211 in words is "two hundred twenty-one trillion, one hundred eleven billion, two hundred one million, one hundred thousand, two hundred eleven".