12121020323 has 4 divisors (see below), whose sum is σ = 12274451040. Its totient is φ = 11967589608.

The previous prime is 12121020319. The next prime is 12121020343. The reversal of 12121020323 is 32302012121.

12121020323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32302012121 = 31 ⋅1042000391.

It is a cyclic number.

It is not a de Polignac number, because 12121020323 - 2² = 12121020319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12121020343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76715240 + ... + 76715397.

It is an arithmetic number, because the mean of its divisors is an integer number (3068612760).

Almost surely, 2^12121020323 is an apocalyptic number.

12121020323 is a deficient number, since it is larger than the sum of its proper divisors (153430717).

12121020323 is an equidigital number, since it uses as much as digits as its factorization.

12121020323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153430716.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 12121020323 its reverse (32302012121), we get a palindrome (44423032444).

The spelling of 12121020323 in words is "twelve billion, one hundred twenty-one million, twenty thousand, three hundred twenty-three".