2024221221 has 72 divisors (see below), whose sum is σ = 3404885120. Its totient is φ = 1157943600.

The previous prime is 2024221217. The next prime is 2024221223. The reversal of 2024221221 is 1221224202.

2024221221 is a `hidden beast` number, since 20 + 2 + 422 + 1 + 221 = 666.

It is not a de Polignac number, because 2024221221 - 2² = 2024221217 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2024221194 and 2024221203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2024221223) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 7469316 + ... + 7469586.

Almost surely, 2^2024221221 is an apocalyptic number.

It is an amenable number.

2024221221 is a deficient number, since it is larger than the sum of its proper divisors (1380663899).

2024221221 is a wasteful number, since it uses less digits than its factorization.

2024221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 2024221221 is about 44991.3460678829. The cubic root of 2024221221 is about 1264.9867925527.

Adding to 2024221221 its reverse (1221224202), we get a palindrome (3245445423).

The spelling of 2024221221 in words is "two billion, twenty-four million, two hundred twenty-one thousand, two hundred twenty-one".