224220121 has 4 divisors (see below), whose sum is σ = 236021200. Its totient is φ = 212419044.

The previous prime is 224220107. The next prime is 224220131. The reversal of 224220121 is 121022422.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 224220121 - 2²⁵ = 190665689 is a prime.

It is a super-2 number, since 2×224220121² = 100549325322509282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 224220095 and 224220104.

It is not an unprimeable number, because it can be changed into a prime (224220131) 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, 5900511 + ... + 5900548.

It is an arithmetic number, because the mean of its divisors is an integer number (59005300).

Almost surely, 2^224220121 is an apocalyptic number.

It is an amenable number.

224220121 is a deficient number, since it is larger than the sum of its proper divisors (11801079).

224220121 is a wasteful number, since it uses less digits than its factorization.

224220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11801078.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 224220121 is about 14973.9814678662. The cubic root of 224220121 is about 607.5166628791.

Adding to 224220121 its reverse (121022422), we get a palindrome (345242543).

The spelling of 224220121 in words is "two hundred twenty-four million, two hundred twenty thousand, one hundred twenty-one".