38328767912221 has 2 divisors, whose sum is σ = 38328767912222. Its totient is φ = 38328767912220.

The previous prime is 38328767912153. The next prime is 38328767912287. The reversal of 38328767912221 is 12221976782383.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25700083725625 + 12628684186596 = 5069525^2 + 3553686^2 .

It is a cyclic number.

It is not a de Polignac number, because 38328767912221 - 2¹⁷ = 38328767781149 is a prime.

It is a super-2 number, since 2×38328767912221² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 38328767912221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38328767913221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19164383956110 + 19164383956111.

It is an arithmetic number, because the mean of its divisors is an integer number (19164383956111).

Almost surely, 2^{38328767912221} is an apocalyptic number.

It is an amenable number.

38328767912221 is a deficient number, since it is larger than the sum of its proper divisors (1).

38328767912221 is an equidigital number, since it uses as much as digits as its factorization.

38328767912221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24385536, while the sum is 61.

The spelling of 38328767912221 in words is "thirty-eight trillion, three hundred twenty-eight billion, seven hundred sixty-seven million, nine hundred twelve thousand, two hundred twenty-one".