121230244243 has 4 divisors (see below), whose sum is σ = 121230989968. Its totient is φ = 121229498520.

The previous prime is 121230244241. The next prime is 121230244321. The reversal of 121230244243 is 342442032121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 342442032121 = 7 ⋅48920290303.

It is a cyclic number.

It is not a de Polignac number, because 121230244243 - 2¹ = 121230244241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121230244241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13671 + ... + 492592.

It is an arithmetic number, because the mean of its divisors is an integer number (30307747492).

Almost surely, 2^121230244243 is an apocalyptic number.

121230244243 is a deficient number, since it is larger than the sum of its proper divisors (745725).

121230244243 is an equidigital number, since it uses as much as digits as its factorization.

121230244243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745724.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 121230244243 its reverse (342442032121), we get a palindrome (463672276364).

The spelling of 121230244243 in words is "one hundred twenty-one billion, two hundred thirty million, two hundred forty-four thousand, two hundred forty-three".