201111310109 has 2 divisors, whose sum is σ = 201111310110. Its totient is φ = 201111310108.

The previous prime is 201111310097. The next prime is 201111310111. The reversal of 201111310109 is 901013111102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101854807609 + 99256502500 = 319147^2 + 315050^2 .

It is a cyclic number.

It is not a de Polignac number, because 201111310109 - 2¹⁶ = 201111244573 is a prime.

Together with 201111310111, 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 (201111310129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100555655054 + 100555655055.

It is an arithmetic number, because the mean of its divisors is an integer number (100555655055).

Almost surely, 2^201111310109 is an apocalyptic number.

It is an amenable number.

201111310109 is a deficient number, since it is larger than the sum of its proper divisors (1).

201111310109 is an equidigital number, since it uses as much as digits as its factorization.

201111310109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 20.

The spelling of 201111310109 in words is "two hundred one billion, one hundred eleven million, three hundred ten thousand, one hundred nine".