21202112084 has 24 divisors (see below), whose sum is σ = 39061948800. Its totient is φ = 10041710400.

The previous prime is 21202112083. The next prime is 21202112093. The reversal of 21202112084 is 48021120212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202112083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 711272 + ... + 740480.

It is an arithmetic number, because the mean of its divisors is an integer number (1627581200).

Almost surely, 2^21202112084 is an apocalyptic number.

It is an amenable number.

21202112084 is a deficient number, since it is larger than the sum of its proper divisors (17859836716).

21202112084 is a wasteful number, since it uses less digits than its factorization.

21202112084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38783 (or 38781 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 21202112084 its reverse (48021120212), we get a palindrome (69223232296).

The spelling of 21202112084 in words is "twenty-one billion, two hundred two million, one hundred twelve thousand, eighty-four".