243121243435 has 32 divisors (see below), whose sum is σ = 348350026752. Its totient is φ = 159266321280.

The previous prime is 243121243397. The next prime is 243121243447. The reversal of 243121243435 is 534342121342.

It is not a de Polignac number, because 243121243435 - 2¹⁹ = 243120719147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243121243435.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 466657 + ... + 839053.

It is an arithmetic number, because the mean of its divisors is an integer number (10885938336).

Almost surely, 2^243121243435 is an apocalyptic number.

243121243435 is a deficient number, since it is larger than the sum of its proper divisors (105228783317).

243121243435 is a wasteful number, since it uses less digits than its factorization.

243121243435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373243.

The product of its digits is 69120, while the sum is 34.

Adding to 243121243435 its reverse (534342121342), we get a palindrome (777463364777).

The spelling of 243121243435 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-three thousand, four hundred thirty-five".