21100213308 has 48 divisors (see below), whose sum is σ = 49470337280. Its totient is φ = 6999696000.

The previous prime is 21100213273. The next prime is 21100213339. The reversal of 21100213308 is 80331200112.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 2382753 + ... + 2391591.

Almost surely, 2^21100213308 is an apocalyptic number.

It is an amenable number.

21100213308 is an abundant number, since it is smaller than the sum of its proper divisors (28370123972).

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

21100213308 is a wasteful number, since it uses less digits than its factorization.

21100213308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9778 (or 9776 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The spelling of 21100213308 in words is "twenty-one billion, one hundred million, two hundred thirteen thousand, three hundred eight".