101020189 has 2 divisors, whose sum is σ = 101020190. Its totient is φ = 101020188.

The previous prime is 101020159. The next prime is 101020217. The reversal of 101020189 is 981020101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101002500 + 17689 = 10050^2 + 133^2 .

It is a cyclic number.

It is not a de Polignac number, because 101020189 - 2²⁵ = 67465757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101020159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50510094 + 50510095.

It is an arithmetic number, because the mean of its divisors is an integer number (50510095).

Almost surely, 2^101020189 is an apocalyptic number.

It is an amenable number.

101020189 is a deficient number, since it is larger than the sum of its proper divisors (1).

101020189 is an equidigital number, since it uses as much as digits as its factorization.

101020189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 101020189 is about 10050.8800112229. The cubic root of 101020189 is about 465.7319785365.

The spelling of 101020189 in words is "one hundred one million, twenty thousand, one hundred eighty-nine".