20011102110 has 128 divisors (see below), whose sum is σ = 55190937600. Its totient is φ = 5156386560.

The previous prime is 20011102109. The next prime is 20011102127. The reversal of 20011102110 is 1120111002.

It is a happy number.

20011102110 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20011102092 and 20011102101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 992530 + ... + 1012490.

It is an arithmetic number, because the mean of its divisors is an integer number (431179200).

Almost surely, 2^20011102110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20011102110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27595468800).

20011102110 is an abundant number, since it is smaller than the sum of its proper divisors (35179835490).

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

20011102110 is a wasteful number, since it uses less digits than its factorization.

20011102110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20103 (or 20097 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20011102110 its reverse (1120111002), we get a palindrome (21131213112).

The spelling of 20011102110 in words is "twenty billion, eleven million, one hundred two thousand, one hundred ten".