224120201221 has 4 divisors (see below), whose sum is σ = 256137372832. Its totient is φ = 192103029612.

The previous prime is 224120201213. The next prime is 224120201297. The reversal of 224120201221 is 122102021422.

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 224120201221 - 2³ = 224120201213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224120201521) 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, 16008585795 + ... + 16008585808.

It is an arithmetic number, because the mean of its divisors is an integer number (64034343208).

Almost surely, 2^224120201221 is an apocalyptic number.

It is an amenable number.

224120201221 is a deficient number, since it is larger than the sum of its proper divisors (32017171611).

224120201221 is an equidigital number, since it uses as much as digits as its factorization.

224120201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32017171610.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 224120201221 its reverse (122102021422), we get a palindrome (346222222643).

The spelling of 224120201221 in words is "two hundred twenty-four billion, one hundred twenty million, two hundred one thousand, two hundred twenty-one".