21222323000 has 64 divisors (see below), whose sum is σ = 50289033600. Its totient is φ = 8381443200.

The previous prime is 21222322993. The next prime is 21222323009. The reversal of 21222323000 is 32322212.

It is a self number, because there is not a number n which added to its sum of digits gives 21222323000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222323009) 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 15 ways as a sum of consecutive naturals, for example, 55319 + ... + 213318.

It is an arithmetic number, because the mean of its divisors is an integer number (785766150).

Almost surely, 2^21222323000 is an apocalyptic number.

21222323000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222323000 is an abundant number, since it is smaller than the sum of its proper divisors (29066710600).

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

21222323000 is a wasteful number, since it uses less digits than its factorization.

21222323000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268737 (or 268723 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 21222323000 its reverse (32322212), we get a palindrome (21254645212).

The spelling of 21222323000 in words is "twenty-one billion, two hundred twenty-two million, three hundred twenty-three thousand".