109990221 has 48 divisors (see below), whose sum is σ = 179189760. Its totient is φ = 59339520.

The previous prime is 109990217. The next prime is 109990229. The reversal of 109990221 is 122099901.

It is not a de Polignac number, because 109990221 - 2² = 109990217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109990229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 180900 + ... + 181506.

It is an arithmetic number, because the mean of its divisors is an integer number (3733120).

Almost surely, 2^109990221 is an apocalyptic number.

109990221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

109990221 is a deficient number, since it is larger than the sum of its proper divisors (69199539).

109990221 is a wasteful number, since it uses less digits than its factorization.

109990221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674 (or 657 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 109990221 is about 10487.6222758068. The cubic root of 109990221 is about 479.1277867113.

The spelling of 109990221 in words is "one hundred nine million, nine hundred ninety thousand, two hundred twenty-one".