21210202232 has 16 divisors (see below), whose sum is σ = 41052004800. Its totient is φ = 10263000960.

The previous prime is 21210202229. The next prime is 21210202243. The reversal of 21210202232 is 23220201212.

It is a self number, because there is not a number n which added to its sum of digits gives 21210202232.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 42762257 + ... + 42762752.

It is an arithmetic number, because the mean of its divisors is an integer number (2565750300).

Almost surely, 2^21210202232 is an apocalyptic number.

It is an amenable number.

21210202232 is a deficient number, since it is larger than the sum of its proper divisors (19841802568).

21210202232 is a wasteful number, since it uses less digits than its factorization.

21210202232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85525046 (or 85525042 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21210202232 its reverse (23220201212), we get a palindrome (44430403444).

The spelling of 21210202232 in words is "twenty-one billion, two hundred ten million, two hundred two thousand, two hundred thirty-two".