21202102202112 has 324 divisors, whose sum is σ = 66228480077760. Its totient is φ = 6520422924288.

The previous prime is 21202102202087. The next prime is 21202102202117. The reversal of 21202102202112 is 21120220120212.

It is a happy number.

21202102202112 is a `hidden beast` number, since 2 + 1 + 20 + 210 + 220 + 211 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202102202117) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 834420064 + ... + 834445472.

Almost surely, 2^{21202102202112} 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 21202102202112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33114240038880).

21202102202112 is an abundant number, since it is smaller than the sum of its proper divisors (45026377875648).

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

21202102202112 is a wasteful number, since it uses less digits than its factorization.

21202102202112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27600 (or 27570 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21202102202112 its reverse (21120220120212), we get a palindrome (42322322322324).

The spelling of 21202102202112 in words is "twenty-one trillion, two hundred two billion, one hundred two million, two hundred two thousand, one hundred twelve".