222410021 has 4 divisors (see below), whose sum is σ = 224909100. Its totient is φ = 219910944.

The previous prime is 222409981. The next prime is 222410057. The reversal of 222410021 is 120014222.

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 84088900 + 138321121 = 9170^2 + 11761^2 .

It is a cyclic number.

It is not a de Polignac number, because 222410021 - 2¹⁰ = 222408997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222409978 and 222410005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222410081) 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, 1249406 + ... + 1249583.

It is an arithmetic number, because the mean of its divisors is an integer number (56227275).

Almost surely, 2^222410021 is an apocalyptic number.

It is an amenable number.

222410021 is a deficient number, since it is larger than the sum of its proper divisors (2499079).

222410021 is an equidigital number, since it uses as much as digits as its factorization.

222410021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2499078.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 222410021 is about 14913.4174822540. The cubic root of 222410021 is about 605.8774427480.

Adding to 222410021 its reverse (120014222), we get a palindrome (342424243).

The spelling of 222410021 in words is "two hundred twenty-two million, four hundred ten thousand, twenty-one".