12315121 has 12 divisors (see below), whose sum is σ = 15428532. Its totient is φ = 9743328.

The previous prime is 12315113. The next prime is 12315131. The reversal of 12315121 is 12151321.

It can be written as a sum of positive squares in 2 ways, for example, as 7075600 + 5239521 = 2660^2 + 2289^2 .

It is not a de Polignac number, because 12315121 - 2³ = 12315113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12315095 and 12315104.

It is not an unprimeable number, because it can be changed into a prime (12315101) 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, 9030 + ... + 10303.

It is an arithmetic number, because the mean of its divisors is an integer number (1285711).

Almost surely, 2^12315121 is an apocalyptic number.

It is an amenable number.

12315121 is a deficient number, since it is larger than the sum of its proper divisors (3113411).

12315121 is a wasteful number, since it uses less digits than its factorization.

12315121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19360 (or 19353 counting only the distinct ones).

The product of its digits is 60, while the sum is 16.

The square root of 12315121 is about 3509.2906690669. The cubic root of 12315121 is about 230.9295775538.

Adding to 12315121 its reverse (12151321), we get a palindrome (24466442).

The spelling of 12315121 in words is "twelve million, three hundred fifteen thousand, one hundred twenty-one".