9005444223221 has 2 divisors, whose sum is σ = 9005444223222. Its totient is φ = 9005444223220.

The previous prime is 9005444223197. The next prime is 9005444223287. The reversal of 9005444223221 is 1223224445009.

9005444223221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5700371127025 + 3305073096196 = 2387545^2 + 1817986^2 .

It is a cyclic number.

It is not a de Polignac number, because 9005444223221 - 2¹⁸ = 9005443961077 is a prime.

It is a super-2 number, since 2×9005444223221² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9005444225221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4502722111610 + 4502722111611.

It is an arithmetic number, because the mean of its divisors is an integer number (4502722111611).

Almost surely, 2^{9005444223221} is an apocalyptic number.

It is an amenable number.

9005444223221 is a deficient number, since it is larger than the sum of its proper divisors (1).

9005444223221 is an equidigital number, since it uses as much as digits as its factorization.

9005444223221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 9005444223221 in words is "nine trillion, five billion, four hundred forty-four million, two hundred twenty-three thousand, two hundred twenty-one".