10221001 has 4 divisors (see below), whose sum is σ = 11681152. Its totient is φ = 8760852.

The previous prime is 10220981. The next prime is 10221007. The reversal of 10221001 is 10012201.

10221001 is digitally balanced in base 3, because in such base 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 an emirpimes, since its reverse is a distinct semiprime: 10012201 = 17 ⋅588953.

It is a cyclic number.

It is not a de Polignac number, because 10221001 - 2¹¹ = 10218953 is a prime.

It is a super-2 number, since 2×10221001² = 208937722884002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (7), and also a Moran number because the ratio is a prime number: 1460143 = 10221001 / (1 + 0 + 2 + 2 + 1 + 0 + 0 + 1).

It is not an unprimeable number, because it can be changed into a prime (10221007) 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, 730065 + ... + 730078.

It is an arithmetic number, because the mean of its divisors is an integer number (2920288).

Almost surely, 2^10221001 is an apocalyptic number.

It is an amenable number.

10221001 is a deficient number, since it is larger than the sum of its proper divisors (1460151).

10221001 is an equidigital number, since it uses as much as digits as its factorization.

10221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1460150.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 10221001 is about 3197.0300280104. The cubic root of 10221001 is about 217.0190261302.

Adding to 10221001 its reverse (10012201), we get a palindrome (20233202).

The spelling of 10221001 in words is "ten million, two hundred twenty-one thousand, one".