21210231332 has 12 divisors (see below), whose sum is σ = 37818243036. Its totient is φ = 10405019040.

The previous prime is 21210231311. The next prime is 21210231347. The reversal of 21210231332 is 23313201212.

It can be written as a sum of positive squares in 2 ways, for example, as 12371223076 + 8839008256 = 111226^2 + 94016^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50023919 + ... + 50024342.

It is an arithmetic number, because the mean of its divisors is an integer number (3151520253).

Almost surely, 2^21210231332 is an apocalyptic number.

It is an amenable number.

21210231332 is a deficient number, since it is larger than the sum of its proper divisors (16608011704).

21210231332 is a wasteful number, since it uses less digits than its factorization.

21210231332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100048318 (or 100048316 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21210231332 its reverse (23313201212), we get a palindrome (44523432544).

The spelling of 21210231332 in words is "twenty-one billion, two hundred ten million, two hundred thirty-one thousand, three hundred thirty-two".