212202221989 has 2 divisors, whose sum is σ = 212202221990. Its totient is φ = 212202221988.

The previous prime is 212202221953. The next prime is 212202222013. The reversal of 212202221989 is 989122202212.

212202221989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 175072785889 + 37129436100 = 418417^2 + 192690^2 .

It is a cyclic number.

It is not a de Polignac number, because 212202221989 - 2⁹ = 212202221477 is a prime.

It is a super-2 number, since 2×212202221989² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212202221939) 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, 106101110994 + 106101110995.

It is an arithmetic number, because the mean of its divisors is an integer number (106101110995).

Almost surely, 2^212202221989 is an apocalyptic number.

It is an amenable number.

212202221989 is a deficient number, since it is larger than the sum of its proper divisors (1).

212202221989 is an equidigital number, since it uses as much as digits as its factorization.

212202221989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 40.

The spelling of 212202221989 in words is "two hundred twelve billion, two hundred two million, two hundred twenty-one thousand, nine hundred eighty-nine".