2424020221 has 4 divisors (see below), whose sum is σ = 2770308832. Its totient is φ = 2077731612.

The previous prime is 2424020219. The next prime is 2424020233. The reversal of 2424020221 is 1220204242.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1220204242 = 2 ⋅610102121.

It is a cyclic number.

It is not a de Polignac number, because 2424020221 - 2¹ = 2424020219 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 (2424020281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173144295 + ... + 173144308.

It is an arithmetic number, because the mean of its divisors is an integer number (692577208).

Almost surely, 2^2424020221 is an apocalyptic number.

It is an amenable number.

2424020221 is a deficient number, since it is larger than the sum of its proper divisors (346288611).

2424020221 is an equidigital number, since it uses as much as digits as its factorization.

2424020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346288610.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 2424020221 is about 49234.3398554302. The cubic root of 2424020221 is about 1343.3177276061.

Adding to 2424020221 its reverse (1220204242), we get a palindrome (3644224463).

The spelling of 2424020221 in words is "two billion, four hundred twenty-four million, twenty thousand, two hundred twenty-one".