12126140506 has 4 divisors (see below), whose sum is σ = 18189210762. Its totient is φ = 6063070252.

The previous prime is 12126140501. The next prime is 12126140603. The reversal of 12126140506 is 60504162121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60504162121 = 13 ⋅4654166317.

It can be written as a sum of positive squares in only one way, i.e., 8428892481 + 3697248025 = 91809^2 + 60805^2 .

It is not an unprimeable number, because it can be changed into a prime (12126140501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3031535125 + ... + 3031535128.

Almost surely, 2^12126140506 is an apocalyptic number.

12126140506 is a deficient number, since it is larger than the sum of its proper divisors (6063070256).

12126140506 is an equidigital number, since it uses as much as digits as its factorization.

12126140506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6063070255.

The product of its (nonzero) digits is 2880, while the sum is 28.

The spelling of 12126140506 in words is "twelve billion, one hundred twenty-six million, one hundred forty thousand, five hundred six".