21002010220110 has 128 divisors (see below), whose sum is σ = 52631979337728. Its totient is φ = 5358870144000.

The previous prime is 21002010220067. The next prime is 21002010220133. The reversal of 21002010220110 is 1102201020012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25632075 + ... + 26438745.

It is an arithmetic number, because the mean of its divisors is an integer number (411187338576).

Almost surely, 2^{21002010220110} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21002010220110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26315989668864).

21002010220110 is an abundant number, since it is smaller than the sum of its proper divisors (31629969117618).

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

21002010220110 is a wasteful number, since it uses less digits than its factorization.

21002010220110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807130.

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

Adding to 21002010220110 its reverse (1102201020012), we get a palindrome (22104211240122).

The spelling of 21002010220110 in words is "twenty-one trillion, two billion, ten million, two hundred twenty thousand, one hundred ten".