1001201189 has 2 divisors, whose sum is σ = 1001201190. Its totient is φ = 1001201188.

The previous prime is 1001201171. The next prime is 1001201197. The reversal of 1001201189 is 9811021001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 783048289 + 218152900 = 27983^2 + 14770^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001201189 - 2²⁰ = 1000152613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001204189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500600594 + 500600595.

It is an arithmetic number, because the mean of its divisors is an integer number (500600595).

Almost surely, 2^1001201189 is an apocalyptic number.

It is an amenable number.

1001201189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001201189 is an equidigital number, since it uses as much as digits as its factorization.

1001201189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 23.

The square root of 1001201189 is about 31641.7633674231. The cubic root of 1001201189 is about 1000.4002361230.

The spelling of 1001201189 in words is "one billion, one million, two hundred one thousand, one hundred eighty-nine".