21230110123220 has 24 divisors (see below), whose sum is σ = 45147575961600. Its totient is φ = 8384549820192.

The previous prime is 21230110123193. The next prime is 21230110123373. The reversal of 21230110123220 is 2232101103212.

21230110123220 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 (20).

It is a junction number, because it is equal to n+sod(n) for n = 21230110123192 and 21230110123201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6718387700 + ... + 6718390859.

It is an arithmetic number, because the mean of its divisors is an integer number (1881148998400).

Almost surely, 2^{21230110123220} is an apocalyptic number.

21230110123220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21230110123220 is an abundant number, since it is smaller than the sum of its proper divisors (23917465838380).

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

21230110123220 is a wasteful number, since it uses less digits than its factorization.

21230110123220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13436778647 (or 13436778645 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21230110123220 its reverse (2232101103212), we get a palindrome (23462211226432).

The spelling of 21230110123220 in words is "twenty-one trillion, two hundred thirty billion, one hundred ten million, one hundred twenty-three thousand, two hundred twenty".