12123122331 has 24 divisors (see below), whose sum is σ = 17487055440. Its totient is φ = 7444751872.

The previous prime is 12123122327. The next prime is 12123122339. The reversal of 12123122331 is 13322132121.

It is not a de Polignac number, because 12123122331 - 2² = 12123122327 is a prime.

It is a super-2 number, since 2×12123122331² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12123122298 and 12123122307.

It is not an unprimeable number, because it can be changed into a prime (12123122339) 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, 58855 + ... + 166463.

It is an arithmetic number, because the mean of its divisors is an integer number (728627310).

Almost surely, 2^12123122331 is an apocalyptic number.

12123122331 is a deficient number, since it is larger than the sum of its proper divisors (5363933109).

12123122331 is a wasteful number, since it uses less digits than its factorization.

12123122331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107723 (or 107676 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

Adding to 12123122331 its reverse (13322132121), we get a palindrome (25445254452).

The spelling of 12123122331 in words is "twelve billion, one hundred twenty-three million, one hundred twenty-two thousand, three hundred thirty-one".