121323121213223 has 4 divisors (see below), whose sum is σ = 121378093177920. Its totient is φ = 121268149248528.

The previous prime is 121323121213201. The next prime is 121323121213253. The reversal of 121323121213223 is 322312121323121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121323121213223 - 2³⁶ = 121254401736487 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 (121323121213253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27485979038 + ... + 27485983451.

It is an arithmetic number, because the mean of its divisors is an integer number (30344523294480).

Almost surely, 2^{121323121213223} is an apocalyptic number.

121323121213223 is a deficient number, since it is larger than the sum of its proper divisors (54971964697).

121323121213223 is an equidigital number, since it uses as much as digits as its factorization.

121323121213223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54971964696.

The product of its digits is 5184, while the sum is 29.

Adding to 121323121213223 its reverse (322312121323121), we get a palindrome (443635242536344).

The spelling of 121323121213223 in words is "one hundred twenty-one trillion, three hundred twenty-three billion, one hundred twenty-one million, two hundred thirteen thousand, two hundred twenty-three".