21231430230330 has 64 divisors (see below), whose sum is σ = 56617783470720. Its totient is φ = 5661651109248.

The previous prime is 21231430230253. The next prime is 21231430230331. The reversal of 21231430230330 is 3303203413212.

21231430230330 is a `hidden beast` number, since 2 + 1 + 23 + 1 + 4 + 302 + 3 + 0 + 330 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21231430230294 and 21231430230303.

It is not an unprimeable number, because it can be changed into a prime (21231430230331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26717214 + ... + 27500406.

It is an arithmetic number, because the mean of its divisors is an integer number (884652866730).

Almost surely, 2^{21231430230330} is an apocalyptic number.

21231430230330 is an abundant number, since it is smaller than the sum of its proper divisors (35386353240390).

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

21231430230330 is a wasteful number, since it uses less digits than its factorization.

21231430230330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883612 (or 883606 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 27.

Adding to 21231430230330 its reverse (3303203413212), we get a palindrome (24534633643542).

The spelling of 21231430230330 in words is "twenty-one trillion, two hundred thirty-one billion, four hundred thirty million, two hundred thirty thousand, three hundred thirty".