9110221 has 2 divisors, whose sum is σ = 9110222. Its totient is φ = 9110220.

The previous prime is 9110203. The next prime is 9110237. The reversal of 9110221 is 1220119.

It is an a-pointer prime, because the next prime (9110237) can be obtained adding 9110221 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9066121 + 44100 = 3011^2 + 210^2 .

It is a cyclic number.

It is not a de Polignac number, because 9110221 - 2¹⁷ = 8979149 is a prime.

It is a super-2 number, since 2×9110221² = 165992253337682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9110195 and 9110204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9110821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4555110 + 4555111.

It is an arithmetic number, because the mean of its divisors is an integer number (4555111).

Almost surely, 2^9110221 is an apocalyptic number.

It is an amenable number.

9110221 is a deficient number, since it is larger than the sum of its proper divisors (1).

9110221 is an equidigital number, since it uses as much as digits as its factorization.

9110221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 9110221 is about 3018.3142646186. The cubic root of 9110221 is about 208.8540834172.

The spelling of 9110221 in words is "nine million, one hundred ten thousand, two hundred twenty-one".