10422221 has 2 divisors, whose sum is σ = 10422222. Its totient is φ = 10422220.

The previous prime is 10422199. The next prime is 10422239. The reversal of 10422221 is 12222401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10048900 + 373321 = 3170^2 + 611^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10422221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10422196 and 10422205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10422421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5211110 + 5211111.

It is an arithmetic number, because the mean of its divisors is an integer number (5211111).

Almost surely, 2^10422221 is an apocalyptic number.

It is an amenable number.

10422221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10422221 is an equidigital number, since it uses as much as digits as its factorization.

10422221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 10422221 is about 3228.3464807855. The cubic root of 10422221 is about 218.4339265435.

Adding to 10422221 its reverse (12222401), we get a palindrome (22644622).

The spelling of 10422221 in words is "ten million, four hundred twenty-two thousand, two hundred twenty-one".