10017221 has 4 divisors (see below), whose sum is σ = 10023552. Its totient is φ = 10010892.

The previous prime is 10017193. The next prime is 10017223. The reversal of 10017221 is 12271001.

10017221 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 10017221 - 2¹⁰ = 10016197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10017196 and 10017205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10017223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1580 + ... + 4746.

It is an arithmetic number, because the mean of its divisors is an integer number (2505888).

Almost surely, 2^10017221 is an apocalyptic number.

It is an amenable number.

10017221 is a deficient number, since it is larger than the sum of its proper divisors (6331).

10017221 is an equidigital number, since it uses as much as digits as its factorization.

10017221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6330.

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 10017221 is about 3164.9993680884. Note that the first 3 decimals coincide. The cubic root of 10017221 is about 215.5670698120.

Adding to 10017221 its reverse (12271001), we get a palindrome (22288222).

The spelling of 10017221 in words is "ten million, seventeen thousand, two hundred twenty-one".