21025005332200 has 48 divisors (see below), whose sum is σ = 48890435415660. Its totient is φ = 8408746560000.

The previous prime is 21025005332179. The next prime is 21025005332207. The reversal of 21025005332200 is 223350052012.

It can be written as a sum of positive squares in 6 ways, for example, as 13668444891396 + 7356560440804 = 3697086^2 + 2712298^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (21025005332207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6503781 + ... + 9184180.

Almost surely, 2^{21025005332200} is an apocalyptic number.

21025005332200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21025005332200 is an abundant number, since it is smaller than the sum of its proper divisors (27865430083460).

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

21025005332200 is a wasteful number, since it uses less digits than its factorization.

21025005332200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15694678 (or 15694669 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

Adding to 21025005332200 its reverse (223350052012), we get a palindrome (21248355384212).

The spelling of 21025005332200 in words is "twenty-one trillion, twenty-five billion, five million, three hundred thirty-two thousand, two hundred".