4223344344421 has 2 divisors, whose sum is σ = 4223344344422. Its totient is φ = 4223344344420.

The previous prime is 4223344344287. The next prime is 4223344344433. The reversal of 4223344344421 is 1244434433224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2959999816225 + 1263344528196 = 1720465^2 + 1123986^2 .

It is a cyclic number.

It is not a de Polignac number, because 4223344344421 - 2²¹ = 4223342247269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4223344344221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2111672172210 + 2111672172211.

It is an arithmetic number, because the mean of its divisors is an integer number (2111672172211).

Almost surely, 2^{4223344344421} is an apocalyptic number.

It is an amenable number.

4223344344421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4223344344421 is an equidigital number, since it uses as much as digits as its factorization.

4223344344421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 884736, while the sum is 40.

Adding to 4223344344421 its reverse (1244434433224), we get a palindrome (5467778777645).

The spelling of 4223344344421 in words is "four trillion, two hundred twenty-three billion, three hundred forty-four million, three hundred forty-four thousand, four hundred twenty-one".