21201001002200 has 48 divisors (see below), whose sum is σ = 49307718244680. Its totient is φ = 8477752501760.

The previous prime is 21201001002191. The next prime is 21201001002227. The reversal of 21201001002200 is 220010010212.

It is a happy number.

It is a congruent number.

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, 15907169 + ... + 17188368.

Almost surely, 2^{21201001002200} is an apocalyptic number.

21201001002200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21201001002200 is an abundant number, since it is smaller than the sum of its proper divisors (28106717242480).

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

21201001002200 is a wasteful number, since it uses less digits than its factorization.

21201001002200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33098756 (or 33098747 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21201001002200 its reverse (220010010212), we get a palindrome (21421011012412).

The spelling of 21201001002200 in words is "twenty-one trillion, two hundred one billion, one million, two thousand, two hundred".