109202221 has 4 divisors (see below), whose sum is σ = 109314972. Its totient is φ = 109089472.

The previous prime is 109202201. The next prime is 109202227. The reversal of 109202221 is 122202901.

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 64979721 + 44222500 = 8061^2 + 6650^2 .

It is a cyclic number.

It is not a de Polignac number, because 109202221 - 2²³ = 100813613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109202227) 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, 54910 + ... + 56863.

It is an arithmetic number, because the mean of its divisors is an integer number (27328743).

Almost surely, 2^109202221 is an apocalyptic number.

It is an amenable number.

109202221 is a deficient number, since it is larger than the sum of its proper divisors (112751).

109202221 is an equidigital number, since it uses as much as digits as its factorization.

109202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112750.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 109202221 is about 10449.9866507092. The cubic root of 109202221 is about 477.9808425298.

The spelling of 109202221 in words is "one hundred nine million, two hundred two thousand, two hundred twenty-one".