243300022121 has 16 divisors (see below), whose sum is σ = 269768611728. Its totient is φ = 217994649600.

The previous prime is 243300022109. The next prime is 243300022127. The reversal of 243300022121 is 121220003342.

It can be written as a sum of positive squares in 8 ways, for example, as 2493903721 + 240806118400 = 49939^2 + 490720^2 .

It is not a de Polignac number, because 243300022121 - 2²⁶ = 243232913257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243300022093 and 243300022102.

It is not an unprimeable number, because it can be changed into a prime (243300022127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1053560 + ... + 1263561.

It is an arithmetic number, because the mean of its divisors is an integer number (16860538233).

Almost surely, 2^243300022121 is an apocalyptic number.

It is an amenable number.

243300022121 is a deficient number, since it is larger than the sum of its proper divisors (26468589607).

243300022121 is a wasteful number, since it uses less digits than its factorization.

243300022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2317372.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 243300022121 its reverse (121220003342), we get a palindrome (364520025463).

The spelling of 243300022121 in words is "two hundred forty-three billion, three hundred million, twenty-two thousand, one hundred twenty-one".