21002102101110 has 256 divisors, whose sum is σ = 56252351232000. Its totient is φ = 4985284423680.

The previous prime is 21002102101049. The next prime is 21002102101121. The reversal of 21002102101110 is 1110120120012.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 730264911 + ... + 730293669.

It is an arithmetic number, because the mean of its divisors is an integer number (219735747000).

Almost surely, 2^{21002102101110} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21002102101110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28126175616000).

21002102101110 is an abundant number, since it is smaller than the sum of its proper divisors (35250249130890).

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

21002102101110 is a wasteful number, since it uses less digits than its factorization.

21002102101110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29351.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21002102101110 its reverse (1110120120012), we get a palindrome (22112222221122).

The spelling of 21002102101110 in words is "twenty-one trillion, two billion, one hundred two million, one hundred one thousand, one hundred ten".