224012021 has 8 divisors (see below), whose sum is σ = 229916160. Its totient is φ = 218183328.

The previous prime is 224012003. The next prime is 224012027. The reversal of 224012021 is 120210422.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 224012021 - 2¹⁴ = 223995637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 224011987 and 224012005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224012027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12821 + ... + 24746.

It is an arithmetic number, because the mean of its divisors is an integer number (28739520).

Almost surely, 2^224012021 is an apocalyptic number.

It is an amenable number.

224012021 is a deficient number, since it is larger than the sum of its proper divisors (5904139).

224012021 is an equidigital number, since it uses as much as digits as its factorization.

224012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37723.

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

The square root of 224012021 is about 14967.0311351316. The cubic root of 224012021 is about 607.3286581201.

Adding to 224012021 its reverse (120210422), we get a palindrome (344222443).

The spelling of 224012021 in words is "two hundred twenty-four million, twelve thousand, twenty-one".