38894234823221 has 2 divisors, whose sum is σ = 38894234823222. Its totient is φ = 38894234823220.

The previous prime is 38894234823133. The next prime is 38894234823233. The reversal of 38894234823221 is 12232843249883.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37843843510225 + 1050391312996 = 6151735^2 + 1024886^2 .

It is a cyclic number.

It is not a de Polignac number, because 38894234823221 - 2¹⁴ = 38894234806837 is a prime.

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 (38894234883221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19447117411610 + 19447117411611.

It is an arithmetic number, because the mean of its divisors is an integer number (19447117411611).

Almost surely, 2^{38894234823221} is an apocalyptic number.

It is an amenable number.

38894234823221 is a deficient number, since it is larger than the sum of its proper divisors (1).

38894234823221 is an equidigital number, since it uses as much as digits as its factorization.

38894234823221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31850496, while the sum is 59.

The spelling of 38894234823221 in words is "thirty-eight trillion, eight hundred ninety-four billion, two hundred thirty-four million, eight hundred twenty-three thousand, two hundred twenty-one".