208128122 has 8 divisors (see below), whose sum is σ = 316589472. Its totient is φ = 102598300.

The previous prime is 208128121. The next prime is 208128143. The reversal of 208128122 is 221821802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 208128091 and 208128100.

It is not an unprimeable number, because it can be changed into a prime (208128121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 732704 + ... + 732987.

It is an arithmetic number, because the mean of its divisors is an integer number (39573684).

Almost surely, 2^208128122 is an apocalyptic number.

208128122 is a deficient number, since it is larger than the sum of its proper divisors (108461350).

208128122 is a wasteful number, since it uses less digits than its factorization.

208128122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465764.

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 208128122 is about 14426.6462492154. The cubic root of 208128122 is about 592.6208428530.

Adding to 208128122 its reverse (221821802), we get a palindrome (429949924).

It can be divided in two parts, 2081 and 28122, that added together give a palindrome (30203).

The spelling of 208128122 in words is "two hundred eight million, one hundred twenty-eight thousand, one hundred twenty-two".