121215244243 has 8 divisors (see below), whose sum is σ = 127848672000. Its totient is φ = 114607184328.

The previous prime is 121215244201. The next prime is 121215244273. The reversal of 121215244243 is 342442512121.

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 121215244243 - 2⁹ = 121215243731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121215244273) 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, 6332143 + ... + 6351256.

It is an arithmetic number, because the mean of its divisors is an integer number (15981084000).

Almost surely, 2^121215244243 is an apocalyptic number.

121215244243 is a deficient number, since it is larger than the sum of its proper divisors (6633427757).

121215244243 is a wasteful number, since it uses less digits than its factorization.

121215244243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12683921.

The product of its digits is 15360, while the sum is 31.

Adding to 121215244243 its reverse (342442512121), we get a palindrome (463657756364).

The spelling of 121215244243 in words is "one hundred twenty-one billion, two hundred fifteen million, two hundred forty-four thousand, two hundred forty-three".