21202121200112 has 20 divisors (see below), whose sum is σ = 42404242401216. Its totient is φ = 10259090903040.

The previous prime is 21202121200109. The next prime is 21202121200231. The reversal of 21202121200112 is 21100212120212.

21202121200112 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

21202121200112 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21373105553 + ... + 21373106544.

Almost surely, 2^{21202121200112} is an apocalyptic number.

It is an amenable number.

21202121200112 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21202121200112 is a wasteful number, since it uses less digits than its factorization.

21202121200112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42746212136 (or 42746212130 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21202121200112 its reverse (21100212120212), we get a palindrome (42302333320324).

The spelling of 21202121200112 in words is "twenty-one trillion, two hundred two billion, one hundred twenty-one million, two hundred thousand, one hundred twelve".