21230023110220 has 48 divisors (see below), whose sum is σ = 46936771308000. Its totient is φ = 8043819125760.

The previous prime is 21230023110203. The next prime is 21230023110221. The reversal of 21230023110220 is 2201132003212.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (21230023110221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1847395 + ... + 6772954.

It is an arithmetic number, because the mean of its divisors is an integer number (977849402250).

Almost surely, 2^{21230023110220} is an apocalyptic number.

21230023110220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21230023110220 is an abundant number, since it is smaller than the sum of its proper divisors (25706748197780).

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

21230023110220 is a wasteful number, since it uses less digits than its factorization.

21230023110220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8626858 (or 8626856 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21230023110220 its reverse (2201132003212), we get a palindrome (23431155113432).

The spelling of 21230023110220 in words is "twenty-one trillion, two hundred thirty billion, twenty-three million, one hundred ten thousand, two hundred twenty".