21233122200 has 72 divisors (see below), whose sum is σ = 71307908100. Its totient is φ = 5662165440.

The previous prime is 21233122171. The next prime is 21233122217. The reversal of 21233122200 is 222133212.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5896290 + ... + 5899889.

Almost surely, 2^21233122200 is an apocalyptic number.

21233122200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21233122200 is an abundant number, since it is smaller than the sum of its proper divisors (50074785900).

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

21233122200 is a wasteful number, since it uses less digits than its factorization.

21233122200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11796201 (or 11796189 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21233122200 its reverse (222133212), we get a palindrome (21455255412).

The spelling of 21233122200 in words is "twenty-one billion, two hundred thirty-three million, one hundred twenty-two thousand, two hundred".