221223230310220 has 24 divisors (see below), whose sum is σ = 464577025538304. Its totient is φ = 88487722240896.

The previous prime is 221223230310167. The next prime is 221223230310239. The reversal of 221223230310220 is 22013032322122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96961849 + ... + 99217168.

It is an arithmetic number, because the mean of its divisors is an integer number (19357376064096).

Almost surely, 2^{221223230310220} is an apocalyptic number.

221223230310220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221223230310220 is an abundant number, since it is smaller than the sum of its proper divisors (243353795228084).

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

221223230310220 is a wasteful number, since it uses less digits than its factorization.

221223230310220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196235409 (or 196235407 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 221223230310220 its reverse (22013032322122), we get a palindrome (243236262632342).

The spelling of 221223230310220 in words is "two hundred twenty-one trillion, two hundred twenty-three billion, two hundred thirty million, three hundred ten thousand, two hundred twenty".