221010212220169 has 2 divisors, whose sum is σ = 221010212220170. Its totient is φ = 221010212220168.

The previous prime is 221010212220143. The next prime is 221010212220223. The reversal of 221010212220169 is 961022212010122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146669345146944 + 74340867073225 = 12110712^2 + 8622115^2 .

It is a cyclic number.

It is not a de Polignac number, because 221010212220169 - 2²⁹ = 221009675349257 is a prime.

It is a super-2 number, since 2×221010212220169² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221010212220169.

It is not a weakly prime, because it can be changed into another prime (221010212220269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110505106110084 + 110505106110085.

It is an arithmetic number, because the mean of its divisors is an integer number (110505106110085).

Almost surely, 2^{221010212220169} is an apocalyptic number.

It is an amenable number.

221010212220169 is a deficient number, since it is larger than the sum of its proper divisors (1).

221010212220169 is an equidigital number, since it uses as much as digits as its factorization.

221010212220169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 31.

The spelling of 221010212220169 in words is "two hundred twenty-one trillion, ten billion, two hundred twelve million, two hundred twenty thousand, one hundred sixty-nine".