121224311211243 has 16 divisors (see below), whose sum is σ = 169532791764480. Its totient is φ = 76958964675936.

The previous prime is 121224311211187. The next prime is 121224311211247. The reversal of 121224311211243 is 342112113422121.

It is not a de Polignac number, because 121224311211243 - 2³⁸ = 120949433304299 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121224311211243.

It is not an unprimeable number, because it can be changed into a prime (121224311211247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11618195973 + ... + 11618206406.

It is an arithmetic number, because the mean of its divisors is an integer number (10595799485280).

Almost surely, 2^{121224311211243} is an apocalyptic number.

121224311211243 is a deficient number, since it is larger than the sum of its proper divisors (48308480553237).

121224311211243 is a wasteful number, since it uses less digits than its factorization.

121224311211243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23236402466.

The product of its digits is 4608, while the sum is 30.

Adding to 121224311211243 its reverse (342112113422121), we get a palindrome (463336424633364).

The spelling of 121224311211243 in words is "one hundred twenty-one trillion, two hundred twenty-four billion, three hundred eleven million, two hundred eleven thousand, two hundred forty-three".