21202010212110 has 512 divisors, whose sum is σ = 66199902289920. Its totient is φ = 4227068270592.

The previous prime is 21202010212109. The next prime is 21202010212133. The reversal of 21202010212110 is 1121201020212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21202010212110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 494624539 + ... + 494667401.

It is an arithmetic number, because the mean of its divisors is an integer number (129296684160).

Almost surely, 2^{21202010212110} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21202010212110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33099951144960).

21202010212110 is an abundant number, since it is smaller than the sum of its proper divisors (44997892077810).

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

21202010212110 is a wasteful number, since it uses less digits than its factorization.

21202010212110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43072.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21202010212110 its reverse (1121201020212), we get a palindrome (22323211232322).

The spelling of 21202010212110 in words is "twenty-one trillion, two hundred two billion, ten million, two hundred twelve thousand, one hundred ten".