21323224450100 has 72 divisors (see below), whose sum is σ = 48149976225120. Its totient is φ = 8189731831680.

The previous prime is 21323224450091. The next prime is 21323224450103. The reversal of 21323224450100 is 105442232312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323224450103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41770787 + ... + 42278186.

Almost surely, 2^{21323224450100} is an apocalyptic number.

21323224450100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21323224450100 is an abundant number, since it is smaller than the sum of its proper divisors (26826751775020).

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

21323224450100 is a wasteful number, since it uses less digits than its factorization.

21323224450100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84049089 (or 84049082 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 21323224450100 its reverse (105442232312), we get a palindrome (21428666682412).

The spelling of 21323224450100 in words is "twenty-one trillion, three hundred twenty-three billion, two hundred twenty-four million, four hundred fifty thousand, one hundred".