21120201202112 has 112 divisors (see below), whose sum is σ = 43428839126400. Its totient is φ = 10184509071360.

The previous prime is 21120201201989. The next prime is 21120201202171. The reversal of 21120201202112 is 21120210202112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 332889689 + ... + 332953127.

It is an arithmetic number, because the mean of its divisors is an integer number (387757492200).

Almost surely, 2^{21120201202112} 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 21120201202112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21714419563200).

21120201202112 is an abundant number, since it is smaller than the sum of its proper divisors (22308637924288).

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

21120201202112 is a wasteful number, since it uses less digits than its factorization.

21120201202112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65174 (or 65164 counting only the distinct ones).

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

Adding to 21120201202112 its reverse (21120210202112), we get a palindrome (42240411404224).

Subtracting 21120201202112 from its reverse (21120210202112), we obtain a square (9000000 = 3000²).

The spelling of 21120201202112 in words is "twenty-one trillion, one hundred twenty billion, two hundred one million, two hundred two thousand, one hundred twelve".