2121100002200 has 24 divisors (see below), whose sum is σ = 4931557505580. Its totient is φ = 848440000800.

The previous prime is 2121100002173. The next prime is 2121100002209. The reversal of 2121100002200 is 22000011212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121100002209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5302749806 + ... + 5302750205.

Almost surely, 2^{2121100002200} is an apocalyptic number.

2121100002200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121100002200 is an abundant number, since it is smaller than the sum of its proper divisors (2810457503380).

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

2121100002200 is a wasteful number, since it uses less digits than its factorization.

2121100002200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10605500027 (or 10605500018 counting only the distinct ones).

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

Adding to 2121100002200 its reverse (22000011212), we get a palindrome (2143100013412).

The spelling of 2121100002200 in words is "two trillion, one hundred twenty-one billion, one hundred million, two thousand, two hundred".