12312011223 has 6 divisors (see below), whose sum is σ = 17784016224. Its totient is φ = 8208007476.

The previous prime is 12312011221. The next prime is 12312011227. The reversal of 12312011223 is 32211021321.

It is not a de Polignac number, because 12312011223 - 2¹ = 12312011221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12312011196 and 12312011205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312011221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 684000615 + ... + 684000632.

It is an arithmetic number, because the mean of its divisors is an integer number (2964002704).

Almost surely, 2^12312011223 is an apocalyptic number.

12312011223 is a deficient number, since it is larger than the sum of its proper divisors (5472005001).

12312011223 is a wasteful number, since it uses less digits than its factorization.

12312011223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368001253 (or 1368001250 counting only the distinct ones).

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

Adding to 12312011223 its reverse (32211021321), we get a palindrome (44523032544).

The spelling of 12312011223 in words is "twelve billion, three hundred twelve million, eleven thousand, two hundred twenty-three".