109966221 has 16 divisors (see below), whose sum is σ = 163339200. Its totient is φ = 73119024.

The previous prime is 109966211. The next prime is 109966267. The reversal of 109966221 is 122669901.

It is not a de Polignac number, because 109966221 - 2¹⁷ = 109835149 is a prime.

It is a super-2 number, since 2×109966221² = 24185139522041682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109966211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5590 + ... + 15848.

It is an arithmetic number, because the mean of its divisors is an integer number (10208700).

Almost surely, 2^109966221 is an apocalyptic number.

It is an amenable number.

109966221 is a deficient number, since it is larger than the sum of its proper divisors (53372979).

109966221 is a wasteful number, since it uses less digits than its factorization.

109966221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10665 (or 10659 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 109966221 is about 10486.4780074151. The cubic root of 109966221 is about 479.0929354211.

The spelling of 109966221 in words is "one hundred nine million, nine hundred sixty-six thousand, two hundred twenty-one".