21100021100202 has 192 divisors, whose sum is σ = 49339285501824. Its totient is φ = 5960779200000.

The previous prime is 21100021100173. The next prime is 21100021100237. The reversal of 21100021100202 is 20200112000112.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 236978452 + ... + 237067472.

It is an arithmetic number, because the mean of its divisors is an integer number (256975445322).

Almost surely, 2^{21100021100202} is an apocalyptic number.

21100021100202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21100021100202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24669642750912).

21100021100202 is an abundant number, since it is smaller than the sum of its proper divisors (28239264401622).

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

21100021100202 is a wasteful number, since it uses less digits than its factorization.

21100021100202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89237 (or 89206 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21100021100202 its reverse (20200112000112), we get a palindrome (41300133100314).

The spelling of 21100021100202 in words is "twenty-one trillion, one hundred billion, twenty-one million, one hundred thousand, two hundred two".