211221222210169 has 2 divisors, whose sum is σ = 211221222210170. Its totient is φ = 211221222210168.

The previous prime is 211221222210137. The next prime is 211221222210263. The reversal of 211221222210169 is 961012222122112.

211221222210169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210740037204544 + 481185005625 = 14516888^2 + 693675^2 .

It is a cyclic number.

It is not a de Polignac number, because 211221222210169 - 2⁵ = 211221222210137 is a prime.

It is a super-2 number, since 2×211221222210169² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211221222210469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105610611105084 + 105610611105085.

It is an arithmetic number, because the mean of its divisors is an integer number (105610611105085).

Almost surely, 2^{211221222210169} is an apocalyptic number.

It is an amenable number.

211221222210169 is a deficient number, since it is larger than the sum of its proper divisors (1).

211221222210169 is an equidigital number, since it uses as much as digits as its factorization.

211221222210169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 34.

The spelling of 211221222210169 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred ten thousand, one hundred sixty-nine".