224212021 has 16 divisors (see below), whose sum is σ = 255571200. Its totient is φ = 194824000.

The previous prime is 224212013. The next prime is 224212049. The reversal of 224212021 is 120212422.

It is a cyclic number.

It is not a de Polignac number, because 224212021 - 2³ = 224212013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 224211986 and 224212004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224212061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28740 + ... + 35698.

It is an arithmetic number, because the mean of its divisors is an integer number (15973200).

Almost surely, 2^224212021 is an apocalyptic number.

It is an amenable number.

224212021 is a deficient number, since it is larger than the sum of its proper divisors (31359179).

224212021 is a wasteful number, since it uses less digits than its factorization.

224212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7100.

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

The square root of 224212021 is about 14973.7109962761. The cubic root of 224212021 is about 607.5093472343.

Adding to 224212021 its reverse (120212422), we get a palindrome (344424443).

It can be divided in two parts, 22421 and 2021, that added together give a palindrome (24442).

The spelling of 224212021 in words is "two hundred twenty-four million, two hundred twelve thousand, twenty-one".