212220221189 has 2 divisors, whose sum is σ = 212220221190. Its totient is φ = 212220221188.

The previous prime is 212220221179. The next prime is 212220221219. The reversal of 212220221189 is 981122022212.

212220221189 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., 184240968289 + 27979252900 = 429233^2 + 167270^2 .

It is a cyclic number.

It is not a de Polignac number, because 212220221189 - 2⁴ = 212220221173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212220221119) 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, 106110110594 + 106110110595.

It is an arithmetic number, because the mean of its divisors is an integer number (106110110595).

Almost surely, 2^212220221189 is an apocalyptic number.

It is an amenable number.

212220221189 is a deficient number, since it is larger than the sum of its proper divisors (1).

212220221189 is an equidigital number, since it uses as much as digits as its factorization.

212220221189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 32.

The spelling of 212220221189 in words is "two hundred twelve billion, two hundred twenty million, two hundred twenty-one thousand, one hundred eighty-nine".