21200133225 has 24 divisors (see below), whose sum is σ = 35086167040. Its totient is φ = 11295357120.

The previous prime is 21200133223. The next prime is 21200133239. The reversal of 21200133225 is 52233100212.

It is not a de Polignac number, because 21200133225 - 2¹ = 21200133223 is a prime.

It is a super-3 number, since 3×21200133225³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21200133223) 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, 66985 + ... + 216534.

Almost surely, 2^21200133225 is an apocalyptic number.

21200133225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21200133225 is a deficient number, since it is larger than the sum of its proper divisors (13886033815).

21200133225 is a wasteful number, since it uses less digits than its factorization.

21200133225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284529 (or 284524 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 21200133225 its reverse (52233100212), we get a palindrome (73433233437).

The spelling of 21200133225 in words is "twenty-one billion, two hundred million, one hundred thirty-three thousand, two hundred twenty-five".