128321210 has 16 divisors (see below), whose sum is σ = 231835392. Its totient is φ = 51138000.

The previous prime is 128321197. The next prime is 128321243. The reversal of 128321210 is 12123821.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20966 + ... + 26385.

It is an arithmetic number, because the mean of its divisors is an integer number (14489712).

Almost surely, 2^128321210 is an apocalyptic number.

128321210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128321210 is a deficient number, since it is larger than the sum of its proper divisors (103514182).

128321210 is a wasteful number, since it uses less digits than its factorization.

128321210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47629.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 128321210 is about 11327.8952149108. The cubic root of 128321210 is about 504.3896295277.

The spelling of 128321210 in words is "one hundred twenty-eight million, three hundred twenty-one thousand, two hundred ten".