20021100100110 has 160 divisors (see below), whose sum is σ = 54375636772512. Its totient is φ = 5285549998080.

The previous prime is 20021100100069. The next prime is 20021100100121. The reversal of 20021100100110 is 1100100112002.

It is a happy number.

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 = 20021100100092 and 20021100100101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 33636690 + ... + 34226730.

Almost surely, 2^{20021100100110} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20021100100110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27187818386256).

20021100100110 is an abundant number, since it is smaller than the sum of its proper divisors (34354536672402).

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

20021100100110 is a wasteful number, since it uses less digits than its factorization.

20021100100110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590480 (or 590471 counting only the distinct ones).

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

Adding to 20021100100110 its reverse (1100100112002), we get a palindrome (21121200212112).

The spelling of 20021100100110 in words is "twenty trillion, twenty-one billion, one hundred million, one hundred thousand, one hundred ten".