12128313394 has 4 divisors (see below), whose sum is σ = 18192470094. Its totient is φ = 6064156696.

The previous prime is 12128313389. The next prime is 12128313409. The reversal of 12128313394 is 49331382121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6526539369 + 5601774025 = 80787^2 + 74845^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3032078347 + ... + 3032078350.

Almost surely, 2^12128313394 is an apocalyptic number.

12128313394 is a deficient number, since it is larger than the sum of its proper divisors (6064156700).

12128313394 is an equidigital number, since it uses as much as digits as its factorization.

12128313394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6064156699.

The product of its digits is 31104, while the sum is 37.

The spelling of 12128313394 in words is "twelve billion, one hundred twenty-eight million, three hundred thirteen thousand, three hundred ninety-four".