38538083031221 has 2 divisors, whose sum is σ = 38538083031222. Its totient is φ = 38538083031220.

The previous prime is 38538083031211. The next prime is 38538083031311. The reversal of 38538083031221 is 12213038083583.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27035736168100 + 11502346863121 = 5199590^2 + 3391511^2 .

It is a cyclic number.

It is not a de Polignac number, because 38538083031221 - 2³⁴ = 38520903162037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38538083031211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19269041515610 + 19269041515611.

It is an arithmetic number, because the mean of its divisors is an integer number (19269041515611).

Almost surely, 2^{38538083031221} is an apocalyptic number.

It is an amenable number.

38538083031221 is a deficient number, since it is larger than the sum of its proper divisors (1).

38538083031221 is an equidigital number, since it uses as much as digits as its factorization.

38538083031221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 38538083031221 in words is "thirty-eight trillion, five hundred thirty-eight billion, eighty-three million, thirty-one thousand, two hundred twenty-one".