21122927112 has 32 divisors (see below), whose sum is σ = 60351220800. Its totient is φ = 6035121984.

The previous prime is 21122927101. The next prime is 21122927131. The reversal of 21122927112 is 21172922112.

It is a self number, because there is not a number n which added to its sum of digits gives 21122927112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62865687 + ... + 62866022.

It is an arithmetic number, because the mean of its divisors is an integer number (1885975650).

Almost surely, 2^21122927112 is an apocalyptic number.

It is an amenable number.

21122927112 is an abundant number, since it is smaller than the sum of its proper divisors (39228293688).

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

21122927112 is a wasteful number, since it uses less digits than its factorization.

21122927112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125731725 (or 125731721 counting only the distinct ones).

The product of its digits is 2016, while the sum is 30.

Subtracting 21122927112 from its reverse (21172922112), we obtain a triangular number (49995000 = T₉₉₉₉).

The spelling of 21122927112 in words is "twenty-one billion, one hundred twenty-two million, nine hundred twenty-seven thousand, one hundred twelve".