21232220200 has 24 divisors (see below), whose sum is σ = 49364912430. Its totient is φ = 8492888000.

The previous prime is 21232220183. The next prime is 21232220257. The reversal of 21232220200 is 202223212.

It can be written as a sum of positive squares in 3 ways, for example, as 11988936036 + 9243284164 = 109494^2 + 96142^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53080351 + ... + 53080750.

Almost surely, 2^21232220200 is an apocalyptic number.

21232220200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21232220200 is an abundant number, since it is smaller than the sum of its proper divisors (28132692230).

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

21232220200 is a wasteful number, since it uses less digits than its factorization.

21232220200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106161117 (or 106161108 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 21232220200 its reverse (202223212), we get a palindrome (21434443412).

The spelling of 21232220200 in words is "twenty-one billion, two hundred thirty-two million, two hundred twenty thousand, two hundred".