211200022112221 has 2 divisors, whose sum is σ = 211200022112222. Its totient is φ = 211200022112220.

The previous prime is 211200022112207. The next prime is 211200022112237. The reversal of 211200022112221 is 122211220002112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200629915743321 + 10570106368900 = 14164389^2 + 3251170^2 .

It is a cyclic number.

It is not a de Polignac number, because 211200022112221 - 2²⁷ = 211199887894493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211200022112921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105600011056110 + 105600011056111.

It is an arithmetic number, because the mean of its divisors is an integer number (105600011056111).

Almost surely, 2^{211200022112221} is an apocalyptic number.

It is an amenable number.

211200022112221 is a deficient number, since it is larger than the sum of its proper divisors (1).

211200022112221 is an equidigital number, since it uses as much as digits as its factorization.

211200022112221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 211200022112221 its reverse (122211220002112), we get a palindrome (333411242114333).

The spelling of 211200022112221 in words is "two hundred eleven trillion, two hundred billion, twenty-two million, one hundred twelve thousand, two hundred twenty-one".