2121100200212 has 72 divisors (see below), whose sum is σ = 4337487207144. Its totient is φ = 904939112448.

The previous prime is 2121100200139. The next prime is 2121100200229. The reversal of 2121100200212 is 2120020011212.

It can be written as a sum of positive squares in 4 ways, for example, as 1408801156 + 2119691399056 = 37534^2 + 1455916^2 .

It is a Harshad number since it is a multiple of its sum of digits (14).

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, 43107368 + ... + 43156544.

It is an arithmetic number, because the mean of its divisors is an integer number (60242877877).

Almost surely, 2^{2121100200212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121100200212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2168743603572).

2121100200212 is an abundant number, since it is smaller than the sum of its proper divisors (2216387006932).

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

2121100200212 is a wasteful number, since it uses less digits than its factorization.

2121100200212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50185 (or 50176 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2121100200212 its reverse (2120020011212), we get a palindrome (4241120211424).

The spelling of 2121100200212 in words is "two trillion, one hundred twenty-one billion, one hundred million, two hundred thousand, two hundred twelve".