4243240221220 has 192 divisors, whose sum is σ = 11985142321152. Its totient is φ = 1218691008000.

The previous prime is 4243240221179. The next prime is 4243240221223. The reversal of 4243240221220 is 221220423424.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (4243240221223) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11245825 + ... + 11617015.

It is an arithmetic number, because the mean of its divisors is an integer number (62422616256).

Almost surely, 2^{4243240221220} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4243240221220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5992571160576).

4243240221220 is an abundant number, since it is smaller than the sum of its proper divisors (7741902099932).

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

4243240221220 is a wasteful number, since it uses less digits than its factorization.

4243240221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371802 (or 371800 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 4243240221220 its reverse (221220423424), we get a palindrome (4464460644644).

The spelling of 4243240221220 in words is "four trillion, two hundred forty-three billion, two hundred forty million, two hundred twenty-one thousand, two hundred twenty".