243121245045 has 64 divisors (see below), whose sum is σ = 463989510144. Its totient is φ = 106286906880.

The previous prime is 243121245013. The next prime is 243121245047. The reversal of 243121245045 is 540542121342.

It is not a de Polignac number, because 243121245045 - 2⁵ = 243121245013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243121244997 and 243121245015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243121245047) 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, 18354625 + ... + 18367865.

It is an arithmetic number, because the mean of its divisors is an integer number (7249836096).

Almost surely, 2^243121245045 is an apocalyptic number.

It is an amenable number.

243121245045 is a deficient number, since it is larger than the sum of its proper divisors (220868265099).

243121245045 is a wasteful number, since it uses less digits than its factorization.

243121245045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20882.

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 243121245045 its reverse (540542121342), we get a palindrome (783663366387).

The spelling of 243121245045 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-five thousand, forty-five".