2220024221 has 2 divisors, whose sum is σ = 2220024222. Its totient is φ = 2220024220.

The previous prime is 2220024217. The next prime is 2220024223. The reversal of 2220024221 is 1224200222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1824571225 + 395452996 = 42715^2 + 19886^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220024221 - 2² = 2220024217 is a prime.

Together with 2220024223, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2220024221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2220024223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110012110 + 1110012111.

It is an arithmetic number, because the mean of its divisors is an integer number (1110012111).

Almost surely, 2^2220024221 is an apocalyptic number.

It is an amenable number.

2220024221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2220024221 is an equidigital number, since it uses as much as digits as its factorization.

2220024221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 2220024221 is about 47117.1329879058. The cubic root of 2220024221 is about 1304.5254942670.

Adding to 2220024221 its reverse (1224200222), we get a palindrome (3444224443).

The spelling of 2220024221 in words is "two billion, two hundred twenty million, twenty-four thousand, two hundred twenty-one".