12688330042 has 4 divisors (see below), whose sum is σ = 19032495066. Its totient is φ = 6344165020.

The previous prime is 12688330037. The next prime is 12688330129. The reversal of 12688330042 is 24003388621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24003388621 = 37 ⋅648740233.

It can be written as a sum of positive squares in only one way, i.e., 8092981521 + 4595348521 = 89961^2 + 67789^2 .

It is a super-3 number, since 3×12688330042³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12688329983 and 12688330010.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3172082509 + ... + 3172082512.

Almost surely, 2^12688330042 is an apocalyptic number.

12688330042 is a deficient number, since it is larger than the sum of its proper divisors (6344165024).

12688330042 is an equidigital number, since it uses as much as digits as its factorization.

12688330042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6344165023.

The product of its (nonzero) digits is 55296, while the sum is 37.

The spelling of 12688330042 in words is "twelve billion, six hundred eighty-eight million, three hundred thirty thousand, forty-two".