21223220000 has 120 divisors (see below), whose sum is σ = 53898147072. Its totient is φ = 8215200000.

The previous prime is 21223219999. The next prime is 21223220041. The reversal of 21223220000 is 2232212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 602885 + ... + 637115.

Almost surely, 2^21223220000 is an apocalyptic number.

21223220000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21223220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26949073536).

21223220000 is an abundant number, since it is smaller than the sum of its proper divisors (32674927072).

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

21223220000 is an equidigital number, since it uses as much as digits as its factorization.

21223220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34292 (or 34269 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

Adding to 21223220000 its reverse (2232212), we get a palindrome (21225452212).

It can be divided in two parts, 212232 and 20000, that added together give a palindrome (232232).

The spelling of 21223220000 in words is "twenty-one billion, two hundred twenty-three million, two hundred twenty thousand".