1143444221 has 2 divisors, whose sum is σ = 1143444222. Its totient is φ = 1143444220.

The previous prime is 1143444217. The next prime is 1143444223. The reversal of 1143444221 is 1224443411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 576528121 + 566916100 = 24011^2 + 23810^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143444221 - 2² = 1143444217 is a prime.

Together with 1143444223, 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 (1143444223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571722110 + 571722111.

It is an arithmetic number, because the mean of its divisors is an integer number (571722111).

Almost surely, 2^1143444221 is an apocalyptic number.

It is an amenable number.

1143444221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143444221 is an equidigital number, since it uses as much as digits as its factorization.

1143444221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 26.

The square root of 1143444221 is about 33814.8520771569. The cubic root of 1143444221 is about 1045.6949113702.

Adding to 1143444221 its reverse (1224443411), we get a palindrome (2367887632).

It can be divided in two parts, 11434 and 44221, that added together give a palindrome (55655).

The spelling of 1143444221 in words is "one billion, one hundred forty-three million, four hundred forty-four thousand, two hundred twenty-one".