109771221 has 12 divisors (see below), whose sum is σ = 170257632. Its totient is φ = 62726328.

The previous prime is 109771201. The next prime is 109771223. The reversal of 109771221 is 122177901.

It is a happy number.

It is not a de Polignac number, because 109771221 - 2¹¹ = 109769173 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109771223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 373225 + ... + 373518.

It is an arithmetic number, because the mean of its divisors is an integer number (14188136).

Almost surely, 2^109771221 is an apocalyptic number.

It is an amenable number.

109771221 is a deficient number, since it is larger than the sum of its proper divisors (60486411).

109771221 is an equidigital number, since it uses as much as digits as its factorization.

109771221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746760 (or 746753 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 30.

The square root of 109771221 is about 10477.1761939943. The cubic root of 109771221 is about 478.8095805340.

The spelling of 109771221 in words is "one hundred nine million, seven hundred seventy-one thousand, two hundred twenty-one".