1020212189 has 2 divisors, whose sum is σ = 1020212190. Its totient is φ = 1020212188.

The previous prime is 1020212183. The next prime is 1020212191. The reversal of 1020212189 is 9812120201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 931287289 + 88924900 = 30517^2 + 9430^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020212189 - 2¹² = 1020208093 is a prime.

Together with 1020212191, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020212183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510106094 + 510106095.

It is an arithmetic number, because the mean of its divisors is an integer number (510106095).

Almost surely, 2^1020212189 is an apocalyptic number.

It is an amenable number.

1020212189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020212189 is an equidigital number, since it uses as much as digits as its factorization.

1020212189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 1020212189 is about 31940.7606202482. The cubic root of 1020212189 is about 1006.6925067682.

The spelling of 1020212189 in words is "one billion, twenty million, two hundred twelve thousand, one hundred eighty-nine".