221211021100211 has 2 divisors, whose sum is σ = 221211021100212. Its totient is φ = 221211021100210.

The previous prime is 221211021100127. The next prime is 221211021100229. The reversal of 221211021100211 is 112001120112122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221211021100211 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221211021100211.

It is not a weakly prime, because it can be changed into another prime (221211021100411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605510550105 + 110605510550106.

It is an arithmetic number, because the mean of its divisors is an integer number (110605510550106).

Almost surely, 2^{221211021100211} is an apocalyptic number.

221211021100211 is a deficient number, since it is larger than the sum of its proper divisors (1).

221211021100211 is an equidigital number, since it uses as much as digits as its factorization.

221211021100211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221211021100211 its reverse (112001120112122), we get a palindrome (333212141212333).

The spelling of 221211021100211 in words is "two hundred twenty-one trillion, two hundred eleven billion, twenty-one million, one hundred thousand, two hundred eleven".