224121340221 has 4 divisors (see below), whose sum is σ = 298828453632. Its totient is φ = 149414226812.

The previous prime is 224121340211. The next prime is 224121340229. The reversal of 224121340221 is 122043121422.

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 224121340221 - 2²³ = 224112951613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 224121340191 and 224121340200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224121340229) 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, 37353556701 + ... + 37353556706.

It is an arithmetic number, because the mean of its divisors is an integer number (74707113408).

Almost surely, 2^224121340221 is an apocalyptic number.

It is an amenable number.

224121340221 is a deficient number, since it is larger than the sum of its proper divisors (74707113411).

224121340221 is an equidigital number, since it uses as much as digits as its factorization.

224121340221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74707113410.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 224121340221 its reverse (122043121422), we get a palindrome (346164461643).

The spelling of 224121340221 in words is "two hundred twenty-four billion, one hundred twenty-one million, three hundred forty thousand, two hundred twenty-one".