21233123000 has 32 divisors (see below), whose sum is σ = 49685510160. Its totient is φ = 8493248800.

The previous prime is 21233122987. The next prime is 21233123047. The reversal of 21233123000 is 32133212.

It is a self number, because there is not a number n which added to its sum of digits gives 21233123000.

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, 10615562 + ... + 10617561.

Almost surely, 2^21233123000 is an apocalyptic number.

21233123000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21233123000 is an abundant number, since it is smaller than the sum of its proper divisors (28452387160).

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

21233123000 is a wasteful number, since it uses less digits than its factorization.

21233123000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21233144 (or 21233130 counting only the distinct ones).

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

Adding to 21233123000 its reverse (32133212), we get a palindrome (21265256212).

The spelling of 21233123000 in words is "twenty-one billion, two hundred thirty-three million, one hundred twenty-three thousand".