243222120020 has 24 divisors (see below), whose sum is σ = 557199766368. Its totient is φ = 88444407200.

The previous prime is 243222120019. The next prime is 243222120041. The reversal of 243222120020 is 20021222342.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 243222119974 and 243222120001.

It is a congruent number.

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, 552777326 + ... + 552777765.

It is an arithmetic number, because the mean of its divisors is an integer number (23216656932).

Almost surely, 2^243222120020 is an apocalyptic number.

243222120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243222120020 is an abundant number, since it is smaller than the sum of its proper divisors (313977646348).

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

243222120020 is a wasteful number, since it uses less digits than its factorization.

243222120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105555111 (or 1105555109 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 243222120020 its reverse (20021222342), we get a palindrome (263243342362).

The spelling of 243222120020 in words is "two hundred forty-three billion, two hundred twenty-two million, one hundred twenty thousand, twenty".