12121232323 has 4 divisors (see below), whose sum is σ = 12648242448. Its totient is φ = 11594222200.

The previous prime is 12121232311. The next prime is 12121232329. The reversal of 12121232323 is 32323212121.

12121232323 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12121232323 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

12121232323 is a modest number, since divided by 232323 gives 12121 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 12121232294 and 12121232303.

It is not an unprimeable number, because it can be changed into a prime (12121232329) 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 3 ways as a sum of consecutive naturals, for example, 263505028 + ... + 263505073.

It is an arithmetic number, because the mean of its divisors is an integer number (3162060612).

Almost surely, 2^12121232323 is an apocalyptic number.

12121232323 is a deficient number, since it is larger than the sum of its proper divisors (527010125).

12121232323 is an equidigital number, since it uses as much as digits as its factorization.

12121232323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527010124.

The product of its digits is 864, while the sum is 22.

Adding to 12121232323 its reverse (32323212121), we get a palindrome (44444444444).

The spelling of 12121232323 in words is "twelve billion, one hundred twenty-one million, two hundred thirty-two thousand, three hundred twenty-three".