221344123220 has 48 divisors (see below), whose sum is σ = 507116852928. Its totient is φ = 80482805760.

The previous prime is 221344123219. The next prime is 221344123249. The reversal of 221344123220 is 22321443122.

It is a self number, because there is not a number n which added to its sum of digits gives 221344123220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3861812 + ... + 3918708.

It is an arithmetic number, because the mean of its divisors is an integer number (10564934436).

Almost surely, 2^221344123220 is an apocalyptic number.

221344123220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221344123220 is an abundant number, since it is smaller than the sum of its proper divisors (285772729708).

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

221344123220 is a wasteful number, since it uses less digits than its factorization.

221344123220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74600 (or 74598 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 221344123220 its reverse (22321443122), we get a palindrome (243665566342).

The spelling of 221344123220 in words is "two hundred twenty-one billion, three hundred forty-four million, one hundred twenty-three thousand, two hundred twenty".