212121212121089 has 2 divisors, whose sum is σ = 212121212121090. Its totient is φ = 212121212121088.

The previous prime is 212121212120989. The next prime is 212121212121103. The reversal of 212121212121089 is 980121212121212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162446062357489 + 49675149763600 = 12745433^2 + 7048060^2 .

It is a cyclic number.

It is not a de Polignac number, because 212121212121089 - 2⁴⁴ = 194529026076673 is a prime.

It is not a weakly prime, because it can be changed into another prime (212121212124089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106060606060544 + 106060606060545.

It is an arithmetic number, because the mean of its divisors is an integer number (106060606060545).

Almost surely, 2^{212121212121089} is an apocalyptic number.

It is an amenable number.

212121212121089 is a deficient number, since it is larger than the sum of its proper divisors (1).

212121212121089 is an equidigital number, since it uses as much as digits as its factorization.

212121212121089 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 35.

The spelling of 212121212121089 in words is "two hundred twelve trillion, one hundred twenty-one billion, two hundred twelve million, one hundred twenty-one thousand, eighty-nine".