10223221 has 2 divisors, whose sum is σ = 10223222. Its totient is φ = 10223220.

The previous prime is 10223209. The next prime is 10223231. The reversal of 10223221 is 12232201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8346321 + 1876900 = 2889^2 + 1370^2 .

It is an emirp because it is prime and its reverse (12232201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10223221 - 2⁷ = 10223093 is a prime.

It is a super-2 number, since 2×10223221² = 209028495229682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10223231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5111610 + 5111611.

It is an arithmetic number, because the mean of its divisors is an integer number (5111611).

Almost surely, 2^10223221 is an apocalyptic number.

It is an amenable number.

10223221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10223221 is an equidigital number, since it uses as much as digits as its factorization.

10223221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 10223221 is about 3197.3772063990. The cubic root of 10223221 is about 217.0347371602.

Adding to 10223221 its reverse (12232201), we get a palindrome (22455422).

The spelling of 10223221 in words is "ten million, two hundred twenty-three thousand, two hundred twenty-one".