21033312230 has 40 divisors (see below), whose sum is σ = 44167378032. Its totient is φ = 7211413104.

The previous prime is 21033312197. The next prime is 21033312253. The reversal of 21033312230 is 3221333012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 414002 + ... + 462021.

Almost surely, 2^21033312230 is an apocalyptic number.

21033312230 is an abundant number, since it is smaller than the sum of its proper divisors (23134065802).

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

21033312230 is an frugal number, since it uses more digits than its factorization.

21033312230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876058 (or 876037 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21033312230 its reverse (3221333012), we get a palindrome (24254645242).

The spelling of 21033312230 in words is "twenty-one billion, thirty-three million, three hundred twelve thousand, two hundred thirty".