243121121203 has 8 divisors (see below), whose sum is σ = 251474881536. Its totient is φ = 234799307400.

The previous prime is 243121121197. The next prime is 243121121219. The reversal of 243121121203 is 302121121342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243121121203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243121121263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7971151 + ... + 8001592.

It is an arithmetic number, because the mean of its divisors is an integer number (31434360192).

Almost surely, 2^243121121203 is an apocalyptic number.

243121121203 is a deficient number, since it is larger than the sum of its proper divisors (8353760333).

243121121203 is a wasteful number, since it uses less digits than its factorization.

243121121203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15973265.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 243121121203 its reverse (302121121342), we get a palindrome (545242242545).

The spelling of 243121121203 in words is "two hundred forty-three billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred three".