12312102123 has 12 divisors (see below), whose sum is σ = 18085574520. Its totient is φ = 8068947936.

The previous prime is 12312102107. The next prime is 12312102137. The reversal of 12312102123 is 32120121321.

It is not a de Polignac number, because 12312102123 - 2⁴ = 12312102107 is a prime.

It is a super-2 number, since 2×12312102123² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12312102096 and 12312102105.

It is not an unprimeable number, because it can be changed into a prime (12312102823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11592786 + ... + 11593847.

It is an arithmetic number, because the mean of its divisors is an integer number (1507131210).

Almost surely, 2^12312102123 is an apocalyptic number.

12312102123 is a deficient number, since it is larger than the sum of its proper divisors (5773472397).

12312102123 is a wasteful number, since it uses less digits than its factorization.

12312102123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23186698 (or 23186695 counting only the distinct ones).

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

Adding to 12312102123 its reverse (32120121321), we get a palindrome (44432223444).

The spelling of 12312102123 in words is "twelve billion, three hundred twelve million, one hundred two thousand, one hundred twenty-three".