221035109 has 2 divisors, whose sum is σ = 221035110. Its totient is φ = 221035108.

The previous prime is 221035103. The next prime is 221035153. The reversal of 221035109 is 901530122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197318209 + 23716900 = 14047^2 + 4870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221035109 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221035103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110517554 + 110517555.

It is an arithmetic number, because the mean of its divisors is an integer number (110517555).

Almost surely, 2^221035109 is an apocalyptic number.

It is an amenable number.

221035109 is a deficient number, since it is larger than the sum of its proper divisors (1).

221035109 is an equidigital number, since it uses as much as digits as its factorization.

221035109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 221035109 is about 14867.2495438800. The cubic root of 221035109 is about 604.6263740498.

The spelling of 221035109 in words is "two hundred twenty-one million, thirty-five thousand, one hundred nine".