10221355 has 4 divisors (see below), whose sum is σ = 12265632. Its totient is φ = 8177080.

The previous prime is 10221353. The next prime is 10221371. The reversal of 10221355 is 55312201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55312201 = 7 ⋅7901743.

It is not a de Polignac number, because 10221355 - 2¹ = 10221353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10221353) 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, 1022131 + ... + 1022140.

It is an arithmetic number, because the mean of its divisors is an integer number (3066408).

Almost surely, 2^10221355 is an apocalyptic number.

10221355 is a deficient number, since it is larger than the sum of its proper divisors (2044277).

10221355 is an equidigital number, since it uses as much as digits as its factorization.

10221355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044276.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 10221355 is about 3197.0853914151. The cubic root of 10221355 is about 217.0215315550.

Adding to 10221355 its reverse (55312201), we get a palindrome (65533556).

The spelling of 10221355 in words is "ten million, two hundred twenty-one thousand, three hundred fifty-five".