11938189308281 has 2 divisors, whose sum is σ = 11938189308282. Its totient is φ = 11938189308280.

The previous prime is 11938189308259. The next prime is 11938189308337. The reversal of 11938189308281 is 18280398183911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9241089287056 + 2697100021225 = 3039916^2 + 1642285^2 .

It is a cyclic number.

It is not a de Polignac number, because 11938189308281 - 2⁶ = 11938189308217 is a prime.

It is a super-2 number, since 2×11938189308281² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11938189308581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5969094654140 + 5969094654141.

It is an arithmetic number, because the mean of its divisors is an integer number (5969094654141).

Almost surely, 2^{11938189308281} is an apocalyptic number.

It is an amenable number.

11938189308281 is a deficient number, since it is larger than the sum of its proper divisors (1).

11938189308281 is an equidigital number, since it uses as much as digits as its factorization.

11938189308281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5971968, while the sum is 62.

The spelling of 11938189308281 in words is "eleven trillion, nine hundred thirty-eight billion, one hundred eighty-nine million, three hundred eight thousand, two hundred eighty-one".