201011199989 has 2 divisors, whose sum is σ = 201011199990. Its totient is φ = 201011199988.

The previous prime is 201011199973. The next prime is 201011200007. The reversal of 201011199989 is 989991110102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200981856100 + 29343889 = 448310^2 + 5417^2 .

It is a cyclic number.

It is not a de Polignac number, because 201011199989 - 2⁴ = 201011199973 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201011199589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100505599994 + 100505599995.

It is an arithmetic number, because the mean of its divisors is an integer number (100505599995).

Almost surely, 2^201011199989 is an apocalyptic number.

It is an amenable number.

201011199989 is a deficient number, since it is larger than the sum of its proper divisors (1).

201011199989 is an equidigital number, since it uses as much as digits as its factorization.

201011199989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 50.

The spelling of 201011199989 in words is "two hundred one billion, eleven million, one hundred ninety-nine thousand, nine hundred eighty-nine".