10221121 has 4 divisors (see below), whose sum is σ = 10248192. Its totient is φ = 10194052.

The previous prime is 10221091. The next prime is 10221149. The reversal of 10221121 is 12112201.

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: 12112201 = 79 ⋅153319.

It is a cyclic number.

It is not a de Polignac number, because 10221121 - 2¹⁹ = 9696833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10221098 and 10221107.

It is not an unprimeable number, because it can be changed into a prime (10221151) 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, 12961 + ... + 13726.

It is an arithmetic number, because the mean of its divisors is an integer number (2562048).

Almost surely, 2^10221121 is an apocalyptic number.

It is an amenable number.

10221121 is a deficient number, since it is larger than the sum of its proper divisors (27071).

10221121 is an equidigital number, since it uses as much as digits as its factorization.

10221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27070.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 10221121 is about 3197.0487953736. The cubic root of 10221121 is about 217.0198754332.

Adding to 10221121 its reverse (12112201), we get a palindrome (22333322).

The spelling of 10221121 in words is "ten million, two hundred twenty-one thousand, one hundred twenty-one".