21110121010110 has 128 divisors (see below), whose sum is σ = 55865133762048. Its totient is φ = 5062599360000.

The previous prime is 21110121010093. The next prime is 21110121010117. The reversal of 21110121010110 is 1101012101112.

It is a super-2 number, since 2×21110121010110² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110121010117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 38758992 + ... + 39299868.

It is an arithmetic number, because the mean of its divisors is an integer number (436446357516).

Almost surely, 2^{21110121010110} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21110121010110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27932566881024).

21110121010110 is an abundant number, since it is smaller than the sum of its proper divisors (34755012751938).

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

21110121010110 is a wasteful number, since it uses less digits than its factorization.

21110121010110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542170.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 21110121010110 its reverse (1101012101112), we get a palindrome (22211133111222).

The spelling of 21110121010110 in words is "twenty-one trillion, one hundred ten billion, one hundred twenty-one million, ten thousand, one hundred ten".