128220111221603 has 2 divisors, whose sum is σ = 128220111221604. Its totient is φ = 128220111221602.

The previous prime is 128220111221563. The next prime is 128220111221639. The reversal of 128220111221603 is 306122111022821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128220111221603 - 2⁶ = 128220111221539 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128220111221603.

It is not a weakly prime, because it can be changed into another prime (128220111221003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64110055610801 + 64110055610802.

It is an arithmetic number, because the mean of its divisors is an integer number (64110055610802).

Almost surely, 2^{128220111221603} is an apocalyptic number.

128220111221603 is a deficient number, since it is larger than the sum of its proper divisors (1).

128220111221603 is an equidigital number, since it uses as much as digits as its factorization.

128220111221603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 32.

The spelling of 128220111221603 in words is "one hundred twenty-eight trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty-one thousand, six hundred three".