10221421 has 8 divisors (see below), whose sum is σ = 11902464. Its totient is φ = 8595600.

The previous prime is 10221397. The next prime is 10221443. The reversal of 10221421 is 12412201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10221421 - 2⁷ = 10221293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13405 + ... + 14146.

It is an arithmetic number, because the mean of its divisors is an integer number (1487808).

Almost surely, 2^10221421 is an apocalyptic number.

It is an amenable number.

10221421 is a deficient number, since it is larger than the sum of its proper divisors (1681043).

10221421 is an equidigital number, since it uses as much as digits as its factorization.

10221421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27611.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 10221421 is about 3197.0957132998. The cubic root of 10221421 is about 217.0219986617.

Adding to 10221421 its reverse (12412201), we get a palindrome (22633622).

The spelling of 10221421 in words is "ten million, two hundred twenty-one thousand, four hundred twenty-one".