21331332230 has 16 divisors (see below), whose sum is σ = 41349967344. Its totient is φ = 7876184160.

The previous prime is 21331332203. The next prime is 21331332259. The reversal of 21331332230 is 3223313312.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21331332196 and 21331332205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82043456 + ... + 82043715.

It is an arithmetic number, because the mean of its divisors is an integer number (2584372959).

Almost surely, 2^21331332230 is an apocalyptic number.

21331332230 is a deficient number, since it is larger than the sum of its proper divisors (20018635114).

21331332230 is a wasteful number, since it uses less digits than its factorization.

21331332230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164087191.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 21331332230 its reverse (3223313312), we get a palindrome (24554645542).

The spelling of 21331332230 in words is "twenty-one billion, three hundred thirty-one million, three hundred thirty-two thousand, two hundred thirty".