12123323331 has 32 divisors (see below), whose sum is σ = 19692134400. Its totient is φ = 6479909280.

The previous prime is 12123323323. The next prime is 12123323341. The reversal of 12123323331 is 13332332121.

It is not a de Polignac number, because 12123323331 - 2³ = 12123323323 is a prime.

It is a super-2 number, since 2×12123323331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12123323341) 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 31 ways as a sum of consecutive naturals, for example, 160785 + ... + 223826.

It is an arithmetic number, because the mean of its divisors is an integer number (615379200).

Almost surely, 2^12123323331 is an apocalyptic number.

12123323331 is a deficient number, since it is larger than the sum of its proper divisors (7568811069).

12123323331 is a wasteful number, since it uses less digits than its factorization.

12123323331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384719.

The product of its digits is 1944, while the sum is 24.

Adding to 12123323331 its reverse (13332332121), we get a palindrome (25455655452).

The spelling of 12123323331 in words is "twelve billion, one hundred twenty-three million, three hundred twenty-three thousand, three hundred thirty-one".