2442231221 has 2 divisors, whose sum is σ = 2442231222. Its totient is φ = 2442231220.

The previous prime is 2442231217. The next prime is 2442231223. The reversal of 2442231221 is 1221322442.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1865030596 + 577200625 = 43186^2 + 24025^2 .

It is a cyclic number.

It is not a de Polignac number, because 2442231221 - 2² = 2442231217 is a prime.

Together with 2442231223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2442231223) 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 as a sum of consecutive naturals, namely, 1221115610 + 1221115611.

It is an arithmetic number, because the mean of its divisors is an integer number (1221115611).

Almost surely, 2^2442231221 is an apocalyptic number.

It is an amenable number.

2442231221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2442231221 is an equidigital number, since it uses as much as digits as its factorization.

2442231221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 23.

The square root of 2442231221 is about 49418.9358545892. The cubic root of 2442231221 is about 1346.6733310606.

Adding to 2442231221 its reverse (1221322442), we get a palindrome (3663553663).

The spelling of 2442231221 in words is "two billion, four hundred forty-two million, two hundred thirty-one thousand, two hundred twenty-one".