243113121245 has 8 divisors (see below), whose sum is σ = 291798606816. Its totient is φ = 194448589456.

The previous prime is 243113121241. The next prime is 243113121257. The reversal of 243113121245 is 542121311342.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 243113121245 - 2² = 243113121241 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243113121241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5212907 + ... + 5259336.

It is an arithmetic number, because the mean of its divisors is an integer number (36474825852).

Almost surely, 2^243113121245 is an apocalyptic number.

It is an amenable number.

243113121245 is a deficient number, since it is larger than the sum of its proper divisors (48685485571).

243113121245 is a wasteful number, since it uses less digits than its factorization.

243113121245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10476891.

The product of its digits is 5760, while the sum is 29.

Adding to 243113121245 its reverse (542121311342), we get a palindrome (785234432587).

The spelling of 243113121245 in words is "two hundred forty-three billion, one hundred thirteen million, one hundred twenty-one thousand, two hundred forty-five".