211220212212169 has 2 divisors, whose sum is σ = 211220212212170. Its totient is φ = 211220212212168.

The previous prime is 211220212212083. The next prime is 211220212212173. The reversal of 211220212212169 is 961212212022112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200699355585600 + 10520856626569 = 14166840^2 + 3243587^2 .

It is a cyclic number.

It is not a de Polignac number, because 211220212212169 - 2¹⁵ = 211220212179401 is a prime.

It is a super-2 number, since 2×211220212212169² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211220212212179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105610106106084 + 105610106106085.

It is an arithmetic number, because the mean of its divisors is an integer number (105610106106085).

Almost surely, 2^{211220212212169} is an apocalyptic number.

It is an amenable number.

211220212212169 is a deficient number, since it is larger than the sum of its proper divisors (1).

211220212212169 is an equidigital number, since it uses as much as digits as its factorization.

211220212212169 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 211220212212169 in words is "two hundred eleven trillion, two hundred twenty billion, two hundred twelve million, two hundred twelve thousand, one hundred sixty-nine".