211001000100221 has 2 divisors, whose sum is σ = 211001000100222. Its totient is φ = 211001000100220.

The previous prime is 211001000100119. The next prime is 211001000100229. The reversal of 211001000100221 is 122001000100112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164604127274596 + 46396872825625 = 12829814^2 + 6811525^2 .

It is a cyclic number.

It is not a de Polignac number, because 211001000100221 - 2⁴² = 206602953589117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211001000100229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105500500050110 + 105500500050111.

It is an arithmetic number, because the mean of its divisors is an integer number (105500500050111).

Almost surely, 2^{211001000100221} is an apocalyptic number.

It is an amenable number.

211001000100221 is a deficient number, since it is larger than the sum of its proper divisors (1).

211001000100221 is an equidigital number, since it uses as much as digits as its factorization.

211001000100221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 211001000100221 its reverse (122001000100112), we get a palindrome (333002000200333).

The spelling of 211001000100221 in words is "two hundred eleven trillion, one billion, one hundred thousand, two hundred twenty-one".