243121243323 has 48 divisors (see below), whose sum is σ = 381321748224. Its totient is φ = 137369534400.

The previous prime is 243121243303. The next prime is 243121243331. The reversal of 243121243323 is 323342121342.

It is a happy number.

It is not a de Polignac number, because 243121243323 - 2¹² = 243121239227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243121243303) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11674186 + ... + 11694992.

It is an arithmetic number, because the mean of its divisors is an integer number (7944203088).

Almost surely, 2^243121243323 is an apocalyptic number.

243121243323 is a deficient number, since it is larger than the sum of its proper divisors (138200504901).

243121243323 is a wasteful number, since it uses less digits than its factorization.

243121243323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21712 (or 21705 counting only the distinct ones).

The product of its digits is 20736, while the sum is 30.

Adding to 243121243323 its reverse (323342121342), we get a palindrome (566463364665).

The spelling of 243121243323 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-three thousand, three hundred twenty-three".