224123021 has 4 divisors (see below), whose sum is σ = 224607552. Its totient is φ = 223638492.

The previous prime is 224122961. The next prime is 224123033. The reversal of 224123021 is 120321422.

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 224123021 - 2²² = 219928717 is a prime.

It is a super-2 number, since 2×224123021² = 100462257084332882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224123041) 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, 241571 + ... + 242496.

It is an arithmetic number, because the mean of its divisors is an integer number (56151888).

Almost surely, 2^224123021 is an apocalyptic number.

It is an amenable number.

224123021 is a deficient number, since it is larger than the sum of its proper divisors (484531).

224123021 is an equidigital number, since it uses as much as digits as its factorization.

224123021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484530.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 224123021 is about 14970.7388261234. The cubic root of 224123021 is about 607.4289538530.

Adding to 224123021 its reverse (120321422), we get a palindrome (344444443).

The spelling of 224123021 in words is "two hundred twenty-four million, one hundred twenty-three thousand, twenty-one".