2011101509 has 2 divisors, whose sum is σ = 2011101510. Its totient is φ = 2011101508.

The previous prime is 2011101451. The next prime is 2011101517. The reversal of 2011101509 is 9051011102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1577837284 + 433264225 = 39722^2 + 20815^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011101509 - 2¹⁶ = 2011035973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011101539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005550754 + 1005550755.

It is an arithmetic number, because the mean of its divisors is an integer number (1005550755).

Almost surely, 2^2011101509 is an apocalyptic number.

It is an amenable number.

2011101509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011101509 is an equidigital number, since it uses as much as digits as its factorization.

2011101509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 20.

The square root of 2011101509 is about 44845.3064322232. The cubic root of 2011101509 is about 1262.2479207070.

The spelling of 2011101509 in words is "two billion, eleven million, one hundred one thousand, five hundred nine".