12121201323 has 24 divisors (see below), whose sum is σ = 21828658176. Its totient is φ = 6296727600.

The previous prime is 12121201321. The next prime is 12121201333. The reversal of 12121201323 is 32310212121.

12121201323 is a `hidden beast` number, since 121 + 21 + 201 + 323 = 666.

It is not a de Polignac number, because 12121201323 - 2¹ = 12121201321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12121201296 and 12121201305.

It is not an unprimeable number, because it can be changed into a prime (12121201321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8744763 + ... + 8746148.

It is an arithmetic number, because the mean of its divisors is an integer number (909527424).

Almost surely, 2^12121201323 is an apocalyptic number.

12121201323 is a deficient number, since it is larger than the sum of its proper divisors (9707456853).

12121201323 is a wasteful number, since it uses less digits than its factorization.

12121201323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17490935 (or 17490932 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12121201323 its reverse (32310212121), we get a palindrome (44431413444).

It can be divided in two parts, 12121 and 201323, that added together give a square (213444 = 462²).

The spelling of 12121201323 in words is "twelve billion, one hundred twenty-one million, two hundred one thousand, three hundred twenty-three".