109028221 has 2 divisors, whose sum is σ = 109028222. Its totient is φ = 109028220.

The previous prime is 109028173. The next prime is 109028237. The reversal of 109028221 is 122820901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108056025 + 972196 = 10395^2 + 986^2 .

It is a cyclic number.

It is not a de Polignac number, because 109028221 - 2⁷ = 109028093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109028321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54514110 + 54514111.

It is an arithmetic number, because the mean of its divisors is an integer number (54514111).

Almost surely, 2^109028221 is an apocalyptic number.

It is an amenable number.

109028221 is a deficient number, since it is larger than the sum of its proper divisors (1).

109028221 is an equidigital number, since it uses as much as digits as its factorization.

109028221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 109028221 is about 10441.6579622204. The cubic root of 109028221 is about 477.7268401297.

The spelling of 109028221 in words is "one hundred nine million, twenty-eight thousand, two hundred twenty-one".