243021222220 has 72 divisors (see below), whose sum is σ = 596774787840. Its totient is φ = 82885259520.

The previous prime is 243021222163. The next prime is 243021222229. The reversal of 243021222220 is 22222120342.

It is a junction number, because it is equal to n+sod(n) for n = 243021222191 and 243021222200.

It is not an unprimeable number, because it can be changed into a prime (243021222229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 461985 + ... + 836344.

It is an arithmetic number, because the mean of its divisors is an integer number (8288538720).

Almost surely, 2^243021222220 is an apocalyptic number.

243021222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243021222220 is an abundant number, since it is smaller than the sum of its proper divisors (353753565620).

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

243021222220 is a wasteful number, since it uses less digits than its factorization.

243021222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298543 (or 1298534 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 243021222220 its reverse (22222120342), we get a palindrome (265243342562).

The spelling of 243021222220 in words is "two hundred forty-three billion, twenty-one million, two hundred twenty-two thousand, two hundred twenty".