21223032200 has 24 divisors (see below), whose sum is σ = 49343550330. Its totient is φ = 8489212800.

The previous prime is 21223032199. The next prime is 21223032209. The reversal of 21223032200 is 223032212.

It can be written as a sum of positive squares in 3 ways, for example, as 9949264516 + 11273767684 = 99746^2 + 106178^2 .

It is not an unprimeable number, because it can be changed into a prime (21223032209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53057381 + ... + 53057780.

Almost surely, 2^21223032200 is an apocalyptic number.

21223032200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21223032200 is an abundant number, since it is smaller than the sum of its proper divisors (28120518130).

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

21223032200 is a wasteful number, since it uses less digits than its factorization.

21223032200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106115177 (or 106115168 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 21223032200 its reverse (223032212), we get a palindrome (21446064412).

The spelling of 21223032200 in words is "twenty-one billion, two hundred twenty-three million, thirty-two thousand, two hundred".