224140121 has 4 divisors (see below), whose sum is σ = 237324852. Its totient is φ = 210955392.

The previous prime is 224140097. The next prime is 224140151. The reversal of 224140121 is 121041422.

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 205520896 + 18619225 = 14336^2 + 4315^2 .

It is a cyclic number.

It is not a de Polignac number, because 224140121 - 2¹⁴ = 224123737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 13184713 = 224140121 / (2 + 2 + 4 + 1 + 4 + 0 + 1 + 2 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 224140121.

It is not an unprimeable number, because it can be changed into a prime (224140151) 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, 6592340 + ... + 6592373.

It is an arithmetic number, because the mean of its divisors is an integer number (59331213).

Almost surely, 2^224140121 is an apocalyptic number.

It is an amenable number.

224140121 is a deficient number, since it is larger than the sum of its proper divisors (13184731).

224140121 is a wasteful number, since it uses less digits than its factorization.

224140121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13184730.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 224140121 is about 14971.3099293282. The cubic root of 224140121 is about 607.4444018733. Note that the first 4 decimals are identical.

Adding to 224140121 its reverse (121041422), we get a palindrome (345181543).

It can be divided in two parts, 2241401 and 21, that added together give a palindrome (2241422).

The spelling of 224140121 in words is "two hundred twenty-four million, one hundred forty thousand, one hundred twenty-one".