21223321221300 has 144 divisors (see below), whose sum is σ = 67007933009472. Its totient is φ = 5143556505600.

The previous prime is 21223321221253. The next prime is 21223321221301. The reversal of 21223321221300 is 312212332212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223321221301) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10477914 + ... + 12338286.

Almost surely, 2^{21223321221300} is an apocalyptic number.

21223321221300 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 21223321221300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33503966504736).

21223321221300 is an abundant number, since it is smaller than the sum of its proper divisors (45784611788172).

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

21223321221300 is a wasteful number, since it uses less digits than its factorization.

21223321221300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1863858 (or 1863851 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21223321221300 its reverse (312212332212), we get a palindrome (21535533553512).

The spelling of 21223321221300 in words is "twenty-one trillion, two hundred twenty-three billion, three hundred twenty-one million, two hundred twenty-one thousand, three hundred".