138546227321 has 2 divisors, whose sum is σ = 138546227322. Its totient is φ = 138546227320.

The previous prime is 138546227311. The next prime is 138546227353. The reversal of 138546227321 is 123722645831.

138546227321 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., 117230227321 + 21316000000 = 342389^2 + 146000^2 .

It is a cyclic number.

It is not a de Polignac number, because 138546227321 - 2⁶ = 138546227257 is a prime.

It is not a weakly prime, because it can be changed into another prime (138546227311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69273113660 + 69273113661.

It is an arithmetic number, because the mean of its divisors is an integer number (69273113661).

Almost surely, 2^138546227321 is an apocalyptic number.

It is an amenable number.

138546227321 is a deficient number, since it is larger than the sum of its proper divisors (1).

138546227321 is an equidigital number, since it uses as much as digits as its factorization.

138546227321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 44.

The spelling of 138546227321 in words is "one hundred thirty-eight billion, five hundred forty-six million, two hundred twenty-seven thousand, three hundred twenty-one".