243121431203 has 64 divisors (see below), whose sum is σ = 306017280000. Its totient is φ = 189009884160.

The previous prime is 243121431197. The next prime is 243121431221. The reversal of 243121431203 is 302134121342.

It is not a de Polignac number, because 243121431203 - 2³⁰ = 242047689379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243121431233) 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, 487217048 + ... + 487217546.

It is an arithmetic number, because the mean of its divisors is an integer number (4781520000).

Almost surely, 2^243121431203 is an apocalyptic number.

243121431203 is a deficient number, since it is larger than the sum of its proper divisors (62895848797).

243121431203 is an equidigital number, since it uses as much as digits as its factorization.

243121431203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045 (or 1011 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 243121431203 its reverse (302134121342), we get a palindrome (545255552545).

The spelling of 243121431203 in words is "two hundred forty-three billion, one hundred twenty-one million, four hundred thirty-one thousand, two hundred three".