21232232200 has 24 divisors (see below), whose sum is σ = 49364940330. Its totient is φ = 8492892800.

The previous prime is 21232232149. The next prime is 21232232201. The reversal of 21232232200 is 223223212.

It can be written as a sum of positive squares in 3 ways, for example, as 7771127716 + 13461104484 = 88154^2 + 116022^2 .

It is not an unprimeable number, because it can be changed into a prime (21232232201) 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, 53080381 + ... + 53080780.

Almost surely, 2^21232232200 is an apocalyptic number.

21232232200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21232232200 is an abundant number, since it is smaller than the sum of its proper divisors (28132708130).

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

21232232200 is a wasteful number, since it uses less digits than its factorization.

21232232200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106161177 (or 106161168 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21232232200 its reverse (223223212), we get a palindrome (21455455412).

The spelling of 21232232200 in words is "twenty-one billion, two hundred thirty-two million, two hundred thirty-two thousand, two hundred".