21231332230 has 16 divisors (see below), whose sum is σ = 39249274320. Its totient is φ = 8263004832.

The previous prime is 21231332153. The next prime is 21231332263. The reversal of 21231332230 is 3223313212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28690620 + ... + 28691359.

It is an arithmetic number, because the mean of its divisors is an integer number (2453079645).

Almost surely, 2^21231332230 is an apocalyptic number.

21231332230 is a deficient number, since it is larger than the sum of its proper divisors (18017942090).

21231332230 is a wasteful number, since it uses less digits than its factorization.

21231332230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57382023.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21231332230 its reverse (3223313212), we get a palindrome (24454645442).

The spelling of 21231332230 in words is "twenty-one billion, two hundred thirty-one million, three hundred thirty-two thousand, two hundred thirty".