212102020189 has 2 divisors, whose sum is σ = 212102020190. Its totient is φ = 212102020188.

The previous prime is 212102020099. The next prime is 212102020201. The reversal of 212102020189 is 981020201212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206373044089 + 5728976100 = 454283^2 + 75690^2 .

It is a cyclic number.

It is not a de Polignac number, because 212102020189 - 2⁷ = 212102020061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212102060189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106051010094 + 106051010095.

It is an arithmetic number, because the mean of its divisors is an integer number (106051010095).

Almost surely, 2^212102020189 is an apocalyptic number.

It is an amenable number.

212102020189 is a deficient number, since it is larger than the sum of its proper divisors (1).

212102020189 is an equidigital number, since it uses as much as digits as its factorization.

212102020189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 28.

The spelling of 212102020189 in words is "two hundred twelve billion, one hundred two million, twenty thousand, one hundred eighty-nine".