12126401524 has 12 divisors (see below), whose sum is σ = 21274659364. Its totient is φ = 6047927424.

The previous prime is 12126401503. The next prime is 12126401549. The reversal of 12126401524 is 42510462121.

It can be written as a sum of positive squares in 2 ways, for example, as 3621873124 + 8504528400 = 60182^2 + 92220^2 .

It is a super-2 number, since 2×12126401524² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12126401492 and 12126401501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3816549 + ... + 3819724.

Almost surely, 2^12126401524 is an apocalyptic number.

It is an amenable number.

12126401524 is a deficient number, since it is larger than the sum of its proper divisors (9148257840).

12126401524 is a wasteful number, since it uses less digits than its factorization.

12126401524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7636674 (or 7636672 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 12126401524 its reverse (42510462121), we get a palindrome (54636863645).

The spelling of 12126401524 in words is "twelve billion, one hundred twenty-six million, four hundred one thousand, five hundred twenty-four".