1210212220169 has 2 divisors, whose sum is σ = 1210212220170. Its totient is φ = 1210212220168.

The previous prime is 1210212220121. The next prime is 1210212220229. The reversal of 1210212220169 is 9610222120121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 808718906944 + 401493313225 = 899288^2 + 633635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210212220169 is a prime.

It is a super-2 number, since 2×1210212220169² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1210212220069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605106110084 + 605106110085.

It is an arithmetic number, because the mean of its divisors is an integer number (605106110085).

Almost surely, 2^{1210212220169} is an apocalyptic number.

It is an amenable number.

1210212220169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210212220169 is an equidigital number, since it uses as much as digits as its factorization.

1210212220169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 29.

The spelling of 1210212220169 in words is "one trillion, two hundred ten billion, two hundred twelve million, two hundred twenty thousand, one hundred sixty-nine".