222010321 has 4 divisors (see below), whose sum is σ = 239088052. Its totient is φ = 204932592.

The previous prime is 222010319. The next prime is 222010337. The reversal of 222010321 is 123010222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 136632721 + 85377600 = 11689^2 + 9240^2 .

It is a cyclic number.

It is not a de Polignac number, because 222010321 - 2¹ = 222010319 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 17077717 = 222010321 / (2 + 2 + 2 + 0 + 1 + 0 + 3 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222013321) 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 3 ways as a sum of consecutive naturals, for example, 8538846 + ... + 8538871.

It is an arithmetic number, because the mean of its divisors is an integer number (59772013).

Almost surely, 2^222010321 is an apocalyptic number.

It is an amenable number.

222010321 is a deficient number, since it is larger than the sum of its proper divisors (17077731).

222010321 is a wasteful number, since it uses less digits than its factorization.

222010321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17077730.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 222010321 is about 14900.0107718082. The cubic root of 222010321 is about 605.5142780132.

Adding to 222010321 its reverse (123010222), we get a palindrome (345020543).

Subtracting from 222010321 its reverse (123010222), we obtain a palindrome (99000099).

The spelling of 222010321 in words is "two hundred twenty-two million, ten thousand, three hundred twenty-one".