2121002200100 has 288 divisors, whose sum is σ = 5771443104000. Its totient is φ = 659689390080.

The previous prime is 2121002200099. The next prime is 2121002200133. The reversal of 2121002200100 is 10022001212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 213611936 + ... + 213621864.

It is an arithmetic number, because the mean of its divisors is an integer number (20039733000).

Almost surely, 2^{2121002200100} is an apocalyptic number.

2121002200100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121002200100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2885721552000).

2121002200100 is an abundant number, since it is smaller than the sum of its proper divisors (3650440903900).

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

2121002200100 is a wasteful number, since it uses less digits than its factorization.

2121002200100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10615 (or 10608 counting only the distinct ones).

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

Adding to 2121002200100 its reverse (10022001212), we get a palindrome (2131024201312).

The spelling of 2121002200100 in words is "two trillion, one hundred twenty-one billion, two million, two hundred thousand, one hundred".