109247221 has 4 divisors (see below), whose sum is σ = 109486732. Its totient is φ = 109007712.

The previous prime is 109247209. The next prime is 109247227. The reversal of 109247221 is 122742901.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38266596 + 70980625 = 6186^2 + 8425^2 .

It is a cyclic number.

It is not a de Polignac number, because 109247221 - 2²³ = 100858613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 109247221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109247227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119070 + ... + 119983.

It is an arithmetic number, because the mean of its divisors is an integer number (27371683).

Almost surely, 2^109247221 is an apocalyptic number.

It is an amenable number.

109247221 is a deficient number, since it is larger than the sum of its proper divisors (239511).

109247221 is an equidigital number, since it uses as much as digits as its factorization.

109247221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239510.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 109247221 is about 10452.1395417398. The cubic root of 109247221 is about 478.0464888872.

It can be divided in two parts, 10924 and 7221, that added together give a triangular number (18145 = T₁₉₀).

The spelling of 109247221 in words is "one hundred nine million, two hundred forty-seven thousand, two hundred twenty-one".