21001203132200 has 48 divisors (see below), whose sum is σ = 48902572161180. Its totient is φ = 8387616757760.

The previous prime is 21001203132167. The next prime is 21001203132241. The reversal of 21001203132200 is 223130210012.

It can be written as a sum of positive squares in 6 ways, for example, as 10942321494724 + 10058881637476 = 3307918^2 + 3171574^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80272169 + ... + 80533368.

Almost surely, 2^{21001203132200} is an apocalyptic number.

21001203132200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21001203132200 is an abundant number, since it is smaller than the sum of its proper divisors (27901369028980).

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

21001203132200 is a wasteful number, since it uses less digits than its factorization.

21001203132200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160806206 (or 160806197 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21001203132200 its reverse (223130210012), we get a palindrome (21224333342212).

The spelling of 21001203132200 in words is "twenty-one trillion, one billion, two hundred three million, one hundred thirty-two thousand, two hundred".