10510221 has 4 divisors (see below), whose sum is σ = 14013632. Its totient is φ = 7006812.

The previous prime is 10510177. The next prime is 10510231. The reversal of 10510221 is 12201501.

10510221 is digitally balanced in base 2 and base 4, 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.

It is not a de Polignac number, because 10510221 - 2¹⁰ = 10509197 is a prime.

It is a super-2 number, since 2×10510221² = 220929490937682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10510197 and 10510206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10510231) 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, 1751701 + ... + 1751706.

It is an arithmetic number, because the mean of its divisors is an integer number (3503408).

Almost surely, 2^10510221 is an apocalyptic number.

It is an amenable number.

10510221 is a deficient number, since it is larger than the sum of its proper divisors (3503411).

10510221 is an equidigital number, since it uses as much as digits as its factorization.

10510221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3503410.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 10510221 is about 3241.9471001236. The cubic root of 10510221 is about 219.0469864363.

Adding to 10510221 its reverse (12201501), we get a palindrome (22711722).

It can be divided in two parts, 10510 and 221, that added together give a triangular number (10731 = T₁₄₆).

The spelling of 10510221 in words is "ten million, five hundred ten thousand, two hundred twenty-one".