224646721442221 has 64 divisors (see below), whose sum is σ = 259481053698048. Its totient is φ = 192649691824128.

The previous prime is 224646721442149. The next prime is 224646721442291. The reversal of 224646721442221 is 122244127646422.

It is not a de Polignac number, because 224646721442221 - 2¹¹ = 224646721440173 is a prime.

It is a super-2 number, since 2×224646721442221² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224646721442291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10296854905 + ... + 10296876721.

It is an arithmetic number, because the mean of its divisors is an integer number (4054391464032).

Almost surely, 2^{224646721442221} is an apocalyptic number.

It is an amenable number.

224646721442221 is a deficient number, since it is larger than the sum of its proper divisors (34834332255827).

224646721442221 is a wasteful number, since it uses less digits than its factorization.

224646721442221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23390.

The product of its digits is 4128768, while the sum is 49.

The spelling of 224646721442221 in words is "two hundred twenty-four trillion, six hundred forty-six billion, seven hundred twenty-one million, four hundred forty-two thousand, two hundred twenty-one".