243112230021 has 24 divisors (see below), whose sum is σ = 344380133344. Its totient is φ = 152522737920.

The previous prime is 243112230019. The next prime is 243112230029. The reversal of 243112230021 is 120032211342.

243112230021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 243112230021 - 2¹ = 243112230019 is a prime.

It is a super-2 number, since 2×243112230021² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243112230021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243112230029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13465026 + ... + 13483068.

Almost surely, 2^243112230021 is an apocalyptic number.

It is an amenable number.

243112230021 is a deficient number, since it is larger than the sum of its proper divisors (101267903323).

243112230021 is a wasteful number, since it uses less digits than its factorization.

243112230021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33621 (or 33604 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 243112230021 its reverse (120032211342), we get a palindrome (363144441363).

The spelling of 243112230021 in words is "two hundred forty-three billion, one hundred twelve million, two hundred thirty thousand, twenty-one".