222241421 has 4 divisors (see below), whose sum is σ = 222271644. Its totient is φ = 222211200.

The previous prime is 222241403. The next prime is 222241441. The reversal of 222241421 is 124142222.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 15888196 + 206353225 = 3986^2 + 14365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222241421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222241393 and 222241402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222241441) 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, 3851 + ... + 21431.

It is an arithmetic number, because the mean of its divisors is an integer number (55567911).

Almost surely, 2^222241421 is an apocalyptic number.

It is an amenable number.

222241421 is a deficient number, since it is larger than the sum of its proper divisors (30223).

222241421 is a wasteful number, since it uses less digits than its factorization.

222241421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30222.

The product of its digits is 512, while the sum is 20.

The square root of 222241421 is about 14907.7637826738. The cubic root of 222241421 is about 605.7243070223.

Adding to 222241421 its reverse (124142222), we get a palindrome (346383643).

The spelling of 222241421 in words is "two hundred twenty-two million, two hundred forty-one thousand, four hundred twenty-one".