10220321 has 4 divisors (see below), whose sum is σ = 10279572. Its totient is φ = 10161072.

The previous prime is 10220311. The next prime is 10220323. The reversal of 10220321 is 12302201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12302201 = 53 ⋅232117.

It can be written as a sum of positive squares in 2 ways, for example, as 5856400 + 4363921 = 2420^2 + 2089^2 .

It is a cyclic number.

It is not a de Polignac number, because 10220321 - 2¹⁸ = 9958177 is a prime.

It is a super-2 number, since 2×10220321² = 208909922686082, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10220323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29366 + ... + 29711.

It is an arithmetic number, because the mean of its divisors is an integer number (2569893).

Almost surely, 2^10220321 is an apocalyptic number.

It is an amenable number.

10220321 is a deficient number, since it is larger than the sum of its proper divisors (59251).

10220321 is an equidigital number, since it uses as much as digits as its factorization.

10220321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59250.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 10220321 is about 3196.9236775375. The cubic root of 10220321 is about 217.0142132875.

Adding to 10220321 its reverse (12302201), we get a palindrome (22522522).

The spelling of 10220321 in words is "ten million, two hundred twenty thousand, three hundred twenty-one".