21233221300 has 18 divisors (see below), whose sum is σ = 46076090438. Its totient is φ = 8493288480.

The previous prime is 21233221291. The next prime is 21233221307. The reversal of 21233221300 is 312233212.

It can be written as a sum of positive squares in 3 ways, for example, as 68644 + 21233152656 = 262^2 + 145716^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233221307) 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 5 ways as a sum of consecutive naturals, for example, 106166007 + ... + 106166206.

Almost surely, 2^21233221300 is an apocalyptic number.

21233221300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21233221300 is an abundant number, since it is smaller than the sum of its proper divisors (24842869138).

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

21233221300 is a wasteful number, since it uses less digits than its factorization.

21233221300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212332227 (or 212332220 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21233221300 its reverse (312233212), we get a palindrome (21545454512).

The spelling of 21233221300 in words is "twenty-one billion, two hundred thirty-three million, two hundred twenty-one thousand, three hundred".