21001233230 has 8 divisors (see below), whose sum is σ = 37802219832. Its totient is φ = 8400493288.

The previous prime is 21001233229. The next prime is 21001233233. The reversal of 21001233230 is 3233210012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21001233199 and 21001233208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001233233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050061652 + ... + 1050061671.

It is an arithmetic number, because the mean of its divisors is an integer number (4725277479).

Almost surely, 2^21001233230 is an apocalyptic number.

21001233230 is a deficient number, since it is larger than the sum of its proper divisors (16800986602).

21001233230 is a wasteful number, since it uses less digits than its factorization.

21001233230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100123330.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21001233230 its reverse (3233210012), we get a palindrome (24234443242).

The spelling of 21001233230 in words is "twenty-one billion, one million, two hundred thirty-three thousand, two hundred thirty".