221112001211 has 2 divisors, whose sum is σ = 221112001212. Its totient is φ = 221112001210.

The previous prime is 221112001157. The next prime is 221112001213. The reversal of 221112001211 is 112100211122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221112001211 is a prime.

Together with 221112001213, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (221112001213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110556000605 + 110556000606.

It is an arithmetic number, because the mean of its divisors is an integer number (110556000606).

Almost surely, 2^221112001211 is an apocalyptic number.

221112001211 is a deficient number, since it is larger than the sum of its proper divisors (1).

221112001211 is an equidigital number, since it uses as much as digits as its factorization.

221112001211 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 14.

Adding to 221112001211 its reverse (112100211122), we get a palindrome (333212212333).

The spelling of 221112001211 in words is "two hundred twenty-one billion, one hundred twelve million, one thousand, two hundred eleven".