16910121228 has 144 divisors (see below), whose sum is σ = 53378922240. Its totient is φ = 4054343040.

The previous prime is 16910121199. The next prime is 16910121253. The reversal of 16910121228 is 82212101961.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

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 in 47 ways as a sum of consecutive naturals, for example, 68143 + ... + 196121.

It is an arithmetic number, because the mean of its divisors is an integer number (370686960).

Almost surely, 2^16910121228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16910121228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26689461120).

16910121228 is an abundant number, since it is smaller than the sum of its proper divisors (36468801012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16910121228 is a wasteful number, since it uses less digits than its factorization.

16910121228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128028 (or 128015 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 33.

The spelling of 16910121228 in words is "sixteen billion, nine hundred ten million, one hundred twenty-one thousand, two hundred twenty-eight".