12126444493 has 4 divisors (see below), whose sum is σ = 12187381600. Its totient is φ = 12065507388.

The previous prime is 12126444487. The next prime is 12126444497. The reversal of 12126444493 is 39444462121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12126444493 - 2³³ = 3536509901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12126444497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30468255 + ... + 30468652.

It is an arithmetic number, because the mean of its divisors is an integer number (3046845400).

Almost surely, 2^12126444493 is an apocalyptic number.

It is an amenable number.

12126444493 is a deficient number, since it is larger than the sum of its proper divisors (60937107).

12126444493 is an equidigital number, since it uses as much as digits as its factorization.

12126444493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60937106.

The product of its digits is 165888, while the sum is 40.

The spelling of 12126444493 in words is "twelve billion, one hundred twenty-six million, four hundred forty-four thousand, four hundred ninety-three".