128278222099 has 2 divisors, whose sum is σ = 128278222100. Its totient is φ = 128278222098.

The previous prime is 128278222091. The next prime is 128278222117. The reversal of 128278222099 is 990222872821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128278222099 - 2³ = 128278222091 is a prime.

It is not a weakly prime, because it can be changed into another prime (128278222091) 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, 64139111049 + 64139111050.

It is an arithmetic number, because the mean of its divisors is an integer number (64139111050).

Almost surely, 2^128278222099 is an apocalyptic number.

128278222099 is a deficient number, since it is larger than the sum of its proper divisors (1).

128278222099 is an equidigital number, since it uses as much as digits as its factorization.

128278222099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1161216, while the sum is 52.

The spelling of 128278222099 in words is "one hundred twenty-eight billion, two hundred seventy-eight million, two hundred twenty-two thousand, ninety-nine".