21202112082 has 16 divisors (see below), whose sum is σ = 43390369440. Its totient is φ = 6903013152.

The previous prime is 21202112051. The next prime is 21202112083. The reversal of 21202112082 is 28021120212.

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, 41089107 + ... + 41089622.

It is an arithmetic number, because the mean of its divisors is an integer number (2711898090).

Almost surely, 2^21202112082 is an apocalyptic number.

21202112082 is an abundant number, since it is smaller than the sum of its proper divisors (22188257358).

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

21202112082 is a wasteful number, since it uses less digits than its factorization.

21202112082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82178777.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 21202112082 its reverse (28021120212), we get a palindrome (49223232294).

The spelling of 21202112082 in words is "twenty-one billion, two hundred two million, one hundred twelve thousand, eighty-two".