121323312111243 has 16 divisors (see below), whose sum is σ = 181239738978816. Its totient is φ = 71542002227040.

The previous prime is 121323312111227. The next prime is 121323312111257. The reversal of 121323312111243 is 342111213323121.

It is not a de Polignac number, because 121323312111243 - 2⁴ = 121323312111227 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121323312111243.

It is not an unprimeable number, because it can be changed into a prime (121323312111143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49681944771 + ... + 49681947212.

It is an arithmetic number, because the mean of its divisors is an integer number (11327483686176).

Almost surely, 2^{121323312111243} is an apocalyptic number.

121323312111243 is a deficient number, since it is larger than the sum of its proper divisors (59916426867573).

121323312111243 is a wasteful number, since it uses less digits than its factorization.

121323312111243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99363892034.

The product of its digits is 5184, while the sum is 30.

Adding to 121323312111243 its reverse (342111213323121), we get a palindrome (463434525434364).

The spelling of 121323312111243 in words is "one hundred twenty-one trillion, three hundred twenty-three billion, three hundred twelve million, one hundred eleven thousand, two hundred forty-three".