2101121210200 has 96 divisors (see below), whose sum is σ = 4989865628160. Its totient is φ = 822431350400.

The previous prime is 2101121210141. The next prime is 2101121210213. The reversal of 2101121210200 is 20121211012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72280869 + ... + 72309931.

It is an arithmetic number, because the mean of its divisors is an integer number (51977766960).

Almost surely, 2^{2101121210200} is an apocalyptic number.

2101121210200 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 2101121210200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2494932814080).

2101121210200 is an abundant number, since it is smaller than the sum of its proper divisors (2888744417960).

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

2101121210200 is a wasteful number, since it uses less digits than its factorization.

2101121210200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36817 (or 36808 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2101121210200 its reverse (20121211012), we get a palindrome (2121242421212).

The spelling of 2101121210200 in words is "two trillion, one hundred one billion, one hundred twenty-one million, two hundred ten thousand, two hundred".