12315123105 has 32 divisors (see below), whose sum is σ = 21116623104. Its totient is φ = 6112694016.

The previous prime is 12315123083. The next prime is 12315123109. The reversal of 12315123105 is 50132151321.

It is not a de Polignac number, because 12315123105 - 2¹⁰ = 12315122081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12315123109) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 469614 + ... + 495143.

It is an arithmetic number, because the mean of its divisors is an integer number (659894472).

Almost surely, 2^12315123105 is an apocalyptic number.

12315123105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12315123105 is a deficient number, since it is larger than the sum of its proper divisors (8801499999).

12315123105 is a wasteful number, since it uses less digits than its factorization.

12315123105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964825.

The product of its (nonzero) digits is 900, while the sum is 24.

Adding to 12315123105 its reverse (50132151321), we get a palindrome (62447274426).

The spelling of 12315123105 in words is "twelve billion, three hundred fifteen million, one hundred twenty-three thousand, one hundred five".