21109044210 has 64 divisors (see below), whose sum is σ = 52320522240. Its totient is φ = 5444936640.

The previous prime is 21109044199. The next prime is 21109044223. The reversal of 21109044210 is 1244090112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2729409 + ... + 2737131.

It is an arithmetic number, because the mean of its divisors is an integer number (817508160).

Almost surely, 2^21109044210 is an apocalyptic number.

21109044210 is an abundant number, since it is smaller than the sum of its proper divisors (31211478030).

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

21109044210 is a wasteful number, since it uses less digits than its factorization.

21109044210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10703.

The product of its (nonzero) digits is 576, while the sum is 24.

The spelling of 21109044210 in words is "twenty-one billion, one hundred nine million, forty-four thousand, two hundred ten".