21231233233 has 8 divisors (see below), whose sum is σ = 24266102400. Its totient is φ = 18196823040.

The previous prime is 21231233209. The next prime is 21231233281. The reversal of 21231233233 is 33233213212.

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

It is a cyclic number.

It is not a de Polignac number, because 21231233233 - 2⁹ = 21231232721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21231233198 and 21231233207.

It is not an unprimeable number, because it can be changed into a prime (21231233333) by changing a digit.

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, 9133 + ... + 206266.

It is an arithmetic number, because the mean of its divisors is an integer number (3033262800).

Almost surely, 2^21231233233 is an apocalyptic number.

It is an amenable number.

21231233233 is a deficient number, since it is larger than the sum of its proper divisors (3034869167).

21231233233 is a wasteful number, since it uses less digits than its factorization.

21231233233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229487.

The product of its digits is 3888, while the sum is 25.

Adding to 21231233233 its reverse (33233213212), we get a palindrome (54464446445).

The spelling of 21231233233 in words is "twenty-one billion, two hundred thirty-one million, two hundred thirty-three thousand, two hundred thirty-three".